What is urex 150mg tablet used for?

This medicine contains nalidixic acid, an older quinolone antibiotic used to treat uncomplicated urinary tract infections caused by susceptible Gram-negative bacteria. It works by inhibiting bacterial DNA gyrase, stopping bacterial growth. It is taken orally, usually four times daily with food. Common side effects include nausea, vomiting, headache, and dizziness. It is contraindicated in patients with seizures, G6PD deficiency, and infants under 3 months. Due to resistance and safety concerns, it is not a first-line treatment.

Generic Name: Nalidixic Acid (150mg)
Manufacturer: Zorex Pharma Pvt Ltd.
Form: Allopathy
Pregnancy Category: Consult doctor
Prescription Required: Yes

🇮🇳 urex 150mg tablet के बारे में (Hindi Summary)

उपयोग: यह दवा नालिडिक्सिक एसिड 150 मिलीग्राम टैबलेट है, जिसका उपयोग मूत्र मार्ग के संक्रमण (यूटीआई) के इलाज के लिए किया जाता है। यह एक एंटीबायोटिक है जो बैक्टीरिया के डीएनए को बनने से रोकता है, जिससे बैक्टीरिया मर जाते हैं। यह दवा मुख्य रूप से ई. कोली, प्रोटियस, क्लेबसिएला जैसे बैक्टीरिया से होने वाले साधारण मूत्र मार्ग संक्रमण के लिए दी जाती है। यह दवा मूत्र मार्ग के बाहर होने वाले संक्रमणों के लिए प्रभावी नहीं है। इसे डॉक्टर के परामर्श के बिना नहीं लेना चाहिए। गर्भवती महिलाओं, स्तनपान कराने वाली महिलाओं, मिर्गी रोगियों, और जी6पीडी की कमी वाले रोगियों को यह दवा नहीं लेनी चाहिए।

साइड इफेक्ट्स: इस दवा के कुछ सामान्य दुष्प्रभाव हो सकते हैं जैसे मतली, उल्टी, पेट दर्द, दस्त, सिरदर्द, चक्कर आना और नींद आना। कुछ लोगों को त्वचा पर चकत्ते, खुजली या धूप से एलर्जी भी हो सकती है। दुर्लभ मामलों में दौरे पड़ सकते हैं, खासकर उन लोगों में जिन्हें पहले से मिर्गी है। रक्त की कमी (एनीमिया) भी हो सकती है। अगर आपको कोई भी असामान्य लक्षण दिखे तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को लेने से पहले अपने डॉक्टर को अपनी सभी स्वास्थ्य समस्याओं और दवाओं के बारे में बताएं। अगर आप गर्भवती हैं, स्तनपान करा रही हैं, या गर्भधारण की योजना बना रही हैं तो डॉक्टर से सलाह लें। यह दवा चक्कर और नींद ला सकती है, इसलिए वाहन चलाने या मशीन चलाने से बचें। धूप में जाने से बचें और सनस्क्रीन का उपयोग करें। दवा को भोजन के साथ और पानी के साथ लें। एंटासिड, आयरन या जिंक की गोलियों के साथ इस दवा को न लें। पूरा कोर्स पूरा करें, भले ही आप बेहतर महसूस करें।

💊 urex 150mg tablet Uses & Benefits

[{"condition":"Uncomplicated lower urinary tract infection","description":"This medicine is used to treat acute uncomplicated cystitis caused by susceptible Gram-negative bacteria such as Escherichia coli, Proteus mirabilis, Klebsiella pneumoniae, and Enterobacter species.","evidence":"Well-established"},{"condition":"Urinary tract infection prophylaxis","description":"In some settings, this medicine has been used to prevent recurrent urinary tract infections, although this is not a first-line approach and is limited by resistance and toxicity.","evidence":"Limited"}]

Off-label uses: [{"condition":"Shigellosis","description":"Nalidixic acid has been used off-label for the treatment of bacillary dysentery caused by susceptible Shigella species, but resistance is common and other agents are preferred.","evidence":"Limited"},{"condition":"Traveler's diarrhoea","description":"Occasionally used off-label for empirical treatment of traveler's diarrhoea, but fluoroquinolones are generally preferred when antibiotics are indicated.","evidence":"Limited"}]

Primary treatment for: Uncomplicated lower urinary tract infection

Also treats: Complicated urinary tract infection (only if susceptible and no better alternative), Shigellosis (off-label)

📋 Drug Information

Generic Name(s)	Nalidixic Acid (150mg)
Brand Name	urex 150mg tablet
Manufacturer	Zorex Pharma Pvt Ltd.
Packaging / Form	Varies by brand (Allopathy)
Therapeutic Class	GASTRO INTESTINAL
Action Class	Quinolones/ Fluroquinolones
Route of Administration	Oral
Storage	Store this medicine at room temperature between 15°C and 30°C (59°F to 86°F) in a cool, dry place. Protect from direct sunlight, moisture, and heat. Keep the tablets in their original container with the lid tightly closed. Do not store in the bathroom or near the kitchen sink. Keep out of reach of children and pets.
Shelf Life	The shelf life of this medicine is typically 24 months from the date of manufacture, but please refer to the expiry date printed on the packaging. Do not use the medicine after the expiry date.
WHO Guideline	Not established from the available information. The World Health Organization does not currently list nalidixic acid in its essential medicines list for urinary tract infections, and fluoroquinolones or other agents are generally preferred.
ICMR Guideline	Not established from the available information. The Indian Council of Medical Research has not issued specific guidelines for nalidixic acid use in recent years, and its use is limited due to resistance and safety concerns.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1

Always prescribe this medicine only after confirming the susceptibility of the infecting organism through urine culture and sensitivity testing.

2

Advise patients to take this medicine with food to minimise gastrointestinal side effects such as nausea and vomiting.

3

Warn patients about the risk of convulsions, especially if they have a history of seizures or are taking other medicines that lower the seizure threshold.

4

Instruct patients to avoid excessive sun exposure and to use sunscreen, as photosensitivity reactions can occur.

5

Emphasise the importance of completing the full course of therapy to prevent recurrence and resistance.

6

Monitor renal function in elderly patients and those with pre-existing kidney disease, as dose adjustment may be required.

7

Avoid concurrent use with nitrofurantoin due to antagonism, and with antacids, sucralfate, iron, or zinc due to reduced absorption.

8

Consider alternative antibiotics for uncomplicated urinary tract infections, as nalidixic acid is not a first-line agent due to resistance and safety concerns.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅

Burning sensation during urination

This medicine is commonly prescribed for this symptom when caused by susceptible bacteria.

Likely Use

✅

Frequent urination

This medicine may be used if the symptom is due to a urinary tract infection.

Likely Use

❌

Fever

This medicine is not a primary fever reducer and is not used for systemic infections.

Not Primary

❌

Cough

This medicine is not effective for respiratory tract infections.

Not Primary

❌

Skin infection

This medicine is not used for skin infections.

Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is rapidly absorbed from the gastrointestinal tract after oral administration. The presence of food in the stomach may delay the rate of absorption but does not significantly affect the extent of absorption. Antacids containing aluminium or magnesium, as well as sucralfate, iron salts, and zinc supplements, can chelate with this medicine and reduce its absorption if taken concurrently.

DistributionThis medicine is widely distributed throughout the body, including the kidneys, lungs, liver, and prostate. It crosses the placenta and is excreted in breast milk. It does not achieve high concentrations in the cerebrospinal fluid. The volume of distribution is not well established from the available information.

Protein BindingThis medicine is approximately 90% bound to plasma proteins, primarily to albumin.

MetabolismThis medicine is partially metabolised in the liver, primarily by glucuronidation and oxidation, to inactive metabolites including hydroxynalidixic acid and glucuronide conjugates. The exact enzymatic pathways have not been fully characterised.

Half-LifeThe elimination half-life of this medicine is approximately 1 to 2.5 hours in patients with normal renal function. The half-life is prolonged in patients with renal impairment.

ExcretionThis medicine and its metabolites are primarily excreted in the urine. Approximately 80% of an oral dose is excreted in the urine within 24 hours, with about 2-3% as unchanged active drug and the remainder as inactive metabolites. Small amounts are excreted in the faeces and breast milk.

BioavailabilityThe oral bioavailability of this medicine is approximately 90% in healthy adults, although it may be reduced by the presence of food or chelating agents.

Onset of ActionThe antibacterial effect of this medicine begins within 1 to 2 hours after oral administration, corresponding to the time required to achieve therapeutic urinary concentrations.

Peak Plasma TimePeak plasma concentrations of this medicine are achieved approximately 1 to 2 hours after oral administration on an empty stomach, and may be delayed if taken with food.

Duration of ActionThe antibacterial activity of this medicine persists for approximately 6 to 8 hours after a single oral dose, reflecting its short half-life and rapid urinary excretion.

How It Works

This medicine exerts its antibacterial effect by inhibiting bacterial DNA gyrase, also known as topoisomerase II. DNA gyrase is an enzyme that introduces negative supercoils into bacterial DNA, a process essential for DNA replication, transcription, and repair. By binding to the A subunit of DNA gyrase, this medicine blocks the enzyme's activity, leading to the accumulation of relaxed DNA and inhibition of bacterial cell division. This results in bacteriostatic action against susceptible Gram-negative bacteria, although at higher concentrations it may be bactericidal. The mechanism is specific to bacterial cells, as human cells do not contain DNA gyrase. However, cross-resistance with other quinolones can occur through mutations in the gyrA gene.

Mechanism Steps

1

Entry into bacterial cell: This medicine penetrates the bacterial cell wall and enters the cytoplasm of Gram-negative bacteria through porin channels.

2

Binding to DNA gyrase: Inside the bacterial cell, this medicine binds to the A subunit of DNA gyrase, forming a stable drug-enzyme-DNA complex.

3

Inhibition of DNA supercoiling: The binding prevents DNA gyrase from introducing negative supercoils into bacterial DNA, which is necessary for relieving torsional stress during replication.

4

Blockade of DNA replication: Without proper supercoiling, bacterial DNA replication is halted, and the cell cannot divide.

5

Bacterial growth inhibition: The interruption of DNA replication leads to inhibition of bacterial growth and, at higher concentrations, bacterial cell death.

💡 How to Take urex 150mg tablet

Strength: This medicine is available as an immediate-release tablet containing 150 mg of nalidixic acid.

1Take this medicine orally with a full glass of water.

2Take it with food or milk to reduce stomach upset.

3Swallow the tablet whole; do not crush, chew, or break it unless advised by your doctor.

4Take it at evenly spaced intervals, such as every 6 hours, as prescribed.

5Do not take antacids, sucralfate, iron, or zinc supplements within 2 hours of taking this medicine.

6Complete the full course of treatment even if you feel better after a few days.

7If you miss a dose, follow the missed dose instructions provided by your doctor.

Dosage Information

Adult Dosage	The usual adult dose of this medicine is 500 mg to 1 gram orally four times daily for 7 to 14 days, depending on the severity of the infection and the clinical response. For uncomplicated urinary tract infections, a dose of 500 mg four times daily is commonly used. The dose may be reduced to 500 mg four times daily after the first few days of therapy. Dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not self-medicate or adjust the dose without medical advice.
Pediatric Dosage	Pediatric dosing is not established from available information. Consult a pediatrician. This medicine is contraindicated in infants below 3 months of age. For older children, the dose is typically calculated based on body weight, but must be determined by a qualified pediatrician.
Elderly Dosage	Elderly patients may have reduced renal function, which can prolong the half-life of this medicine and increase the risk of side effects. Dose adjustment may be necessary based on renal function. Elderly patients should be monitored closely for neurological side effects such as dizziness, drowsiness, and confusion. Dose must be individualized by a qualified clinician.
Renal Impairment	In patients with renal impairment, the dose of this medicine may need to be reduced. For patients with a creatinine clearance between 30 and 60 mL/min, a dose reduction or increased dosing interval may be considered. This medicine is not recommended for patients with severe renal impairment (creatinine clearance < 30 mL/min) unless the potential benefit outweighs the risk. Dose must be individualized by a qualified clinician based on renal function.
Hepatic Impairment	In patients with hepatic impairment, this medicine should be used with caution. The metabolism of this medicine may be reduced, leading to increased plasma levels and risk of toxicity. Dose adjustment may be necessary. Monitor liver function tests regularly. Dose must be individualized by a qualified clinician.
Maximum Daily Dose	The maximum recommended daily dose of this medicine is 4 grams (4000 mg) per day, divided into four doses. Do not exceed this dose without medical supervision.

Dosage Timeline

🌅 Morning ❌ ☀️ Afternoon ❌ 🌆 Evening ❌ 🌙 Night ❌

🍽️ Food Timing Guide

With food

Take with meals or a snack

Reduces stomach upset and nausea.

Caffeine-containing beverages

Limit intake

This medicine may increase caffeine effects, causing jitteriness and insomnia.

Dairy products

No specific restriction

Dairy does not significantly affect absorption.

⏰ What to Do If You Miss a Dose

📌 Less than half the dosing interval has passed

→ Take the missed dose as soon as you remember.

💡 Continue with the regular schedule.

📌 More than half the dosing interval has passed

→ Skip the missed dose.

💡 Do not double dose to catch up.

📌 You miss multiple doses

→ Contact your doctor for advice.

💡 Do not attempt to make up for multiple missed doses on your own.

⚠️ Side Effects of urex 150mg tablet

✅ Common Side Effects

Nausea (Common (5-10%))

Take the medicine with food or milk to reduce nausea. If nausea persists, consult your doctor.

Vomiting (Common (5-10%))

Take with food and stay hydrated. If vomiting is severe or persistent, contact your doctor.

Abdominal pain (Common (5-10%))

Take with food. If pain is severe or accompanied by blood in stool, seek medical attention.

Diarrhoea (Common (5-10%))

Stay hydrated. If diarrhoea is severe or contains blood or mucus, contact your doctor immediately.

Headache (Common (5-10%))

Rest and stay hydrated. If headache is severe or persistent, consult your doctor.

Dizziness (Common (5-10%))

Avoid driving or operating machinery until you know how this medicine affects you. If dizziness is severe, contact your doctor.

Drowsiness (Common (5-10%))

Avoid driving or operating heavy machinery. If drowsiness interferes with daily activities, consult your doctor.

Rash (Uncommon (1-5%))

Stop the medicine and consult your doctor if rash develops. Seek immediate care if rash is accompanied by swelling or difficulty breathing.

Photosensitivity (Uncommon (1-5%))

Avoid prolonged sun exposure, use sunscreen, and wear protective clothing. Consult your doctor if skin reactions occur.

Visual disturbances (Uncommon (1-5%))

Do not drive if vision is affected. Consult your doctor if visual changes persist or worsen.

🚨 Serious Side Effects

Convulsions (Rare (<0.1%))

Seek immediate medical attention if you experience seizures, confusion, or loss of consciousness.

Haemolytic anaemia (Rare (<0.1%))

Seek immediate medical attention if you notice yellowing of skin or eyes, dark urine, or extreme fatigue.

Pseudomembranous colitis (Rare (<0.1%))

Seek immediate medical attention if you develop severe diarrhoea, abdominal cramps, or fever during or after treatment.

Thrombocytopenia (Rare (<0.1%))

Seek immediate medical attention if you notice unusual bleeding or bruising.

Leukopenia (Rare (<0.1%))

Consult your doctor if you develop frequent infections, fever, or sore throat.

Anaphylaxis (Very rare (<0.01%))

Seek emergency medical help immediately if you experience swelling of the face, lips, tongue, or throat, difficulty breathing, or a severe rash.

⚠️ Rare Side Effects

Eosinophilia

Usually detected on blood tests. Consult your doctor if you have unexplained symptoms.

Metabolic acidosis

Seek medical attention if you experience rapid breathing, confusion, or extreme fatigue.

Increased intracranial pressure

Seek immediate medical attention if you experience severe headache, blurred vision, or vomiting.

Toxic psychosis

Seek immediate medical attention if you experience hallucinations, confusion, or unusual behaviour.

Cholestatic jaundice

Seek medical attention if you notice yellowing of skin or eyes, dark urine, or pale stools.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug	Severity	Effect
Warfarin	Major
Antacids (Al/Mg)	Major
Sucralfate	Major
Iron salts	Major
Zinc supplements	Major
Nitrofurantoin	Major
Caffeine	Moderate
Theophylline	Moderate
Cimetidine	Moderate
Probenecid	Moderate

🚨 Major Interactions

Warfarin
Antacids containing aluminium or magnesium
Sucralfate
Iron salts
Zinc supplements
Nitrofurantoin

⚡ Moderate Interactions

Caffeine
Theophylline
Cimetidine
Probenecid
Oral contraceptives

🍷 Alcohol Interaction

Alcohol should be avoided while taking this medicine. Both alcohol and this medicine can cause dizziness, drowsiness, and central nervous system depression, and their combined use may increase the risk of these effects. Alcohol may also worsen gastrointestinal side effects such as nausea and abdominal pain. Additionally, alcohol can increase the risk of seizures, which is a rare but serious side effect of this medicine.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to nalidixic acid or other quinolone antibiotics","History of convulsive disorders, including epilepsy","Glucose-6-phosphate dehydrogenase (G6PD) deficiency","Infants below 3 months of age","Severe renal impairment (creatinine clearance < 30 mL/min) without dose adjustment","Pregnancy and breastfeeding, unless clearly necessary","Concurrent use with nitrofurantoin"]

⚠️ Warnings & Precautions

["This medicine may cause convulsions, particularly in patients with a history of seizures or those taking certain interacting medicines. Use with caution in such patients.","Haemolytic anaemia may occur in patients with glucose-6-phosphate dehydrogenase deficiency. Avoid use in these patients.","Photosensitivity reactions can occur. Advise patients to avoid excessive sun exposure and use protective measures.","Pseudomembranous colitis has been reported with this medicine. Consider this diagnosis in patients who develop diarrhoea during or after treatment.","Visual disturbances, including diplopia and blurred vision, have been reported. Patients should avoid driving or operating machinery if affected.","This medicine should not be used for the treatment of gonorrhoea or syphilis, as it is not effective against these organisms.","Prolonged use may lead to the overgrowth of non-susceptible organisms, including fungi. Monitor patients for superinfections.","Patients should be advised to complete the full course of therapy even if symptoms improve, to prevent resistance."]

🤱 Lactation Safety

This medicine is excreted in breast milk. Because of the potential for serious adverse reactions in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the medicine, taking into account the importance of the medicine to the mother. Consult your doctor before breastfeeding while taking this medicine.

💊 Overdose Management

Overdose with this medicine may cause nausea, vomiting, headache, dizziness, and, in severe cases, convulsions and metabolic acidosis. There is no specific antidote. Treatment should be symptomatic and supportive. Gastric lavage may be considered if the overdose is recent and the patient is seen within 1-2 hours of ingestion. Maintain adequate hydration and monitor vital signs, neurological status, and electrolyte balance. Convulsions should be managed with appropriate anticonvulsant therapy. Contact a poison control centre or emergency department immediately if overdose is suspected.

⏰ Missed Dose

If you miss a dose of this medicine, take it as soon as you remember. However, if it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are unsure what to do, consult your doctor or pharmacist.

Additional Safety Advice

General Safety

Before taking this medicine, inform your doctor if you have or have ever had seizures, kidney or liver problems, glucose-6-phosphate dehydrogenase deficiency, or any allergic reaction to quinolone antibiotics. Do not take this medicine if you are pregnant, planning to become pregnant, or breastfeeding without consulting your doctor first. This medicine may cause dizziness, drowsiness, or visual changes; avoid driving or operating heavy machinery until you know how it affects you. Avoid excessive exposure to sunlight and use protective clothing and sunscreen, as this medicine can make your skin more sensitive to sunlight. Take this medicine with food and a full glass of water to reduce stomach upset. Do not take antacids, sucralfate, or iron or zinc supplements within two hours of taking this medicine, as they can reduce its absorption. Complete the full course of treatment even if you feel better after a few days. Do not share this medicine with others. Keep out of reach of children. Store in a cool, dry place away from direct sunlight.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients are more likely to have reduced renal function, which can prolong the half-life of this medicine and increase the risk of side effects. Dose adjustment may be necessary based on creatinine clearance. Elderly patients should be monitored closely for neurological side effects such as dizziness, drowsiness, confusion, and seizures. They may also be more susceptible to photosensitivity reactions and should take appropriate precautions.

🤰 Pregnancy Planning (TTC)

This medicine should be avoided during pregnancy and while trying to conceive. If you are planning pregnancy, consult your doctor to discuss alternative antibiotics that are safer for use during pregnancy. This medicine crosses the placenta and may pose risks to the developing fetus. Use effective contraception while taking this medicine.

🏥 Post-Surgery Considerations

If you are scheduled for surgery, inform your surgeon and anaesthesiologist that you are taking this medicine. This medicine may interact with certain anaesthetic agents and can increase the risk of seizures. Your doctor may advise you to stop the medicine before surgery or to switch to an alternative antibiotic. Do not stop the medicine without consulting your doctor.

🦷 Dental Procedures

Inform your dentist that you are taking this medicine before any dental procedure. This medicine may interact with certain antibiotics or anaesthetics used in dentistry. Additionally, if you have a dental infection, this medicine is not effective against most oral bacteria, and your dentist may prescribe a different antibiotic.

💚 Lifestyle Tips for Better Results

🏃

Drink plenty of water throughout the day to help flush out bacteria from the urinary tract.

🥗

Urinate frequently and completely; do not hold urine for long periods.

😴

Maintain good genital hygiene and wipe from front to back after using the toilet.

💧

Avoid caffeine and alcohol, which can irritate the bladder.

🧘

Include probiotic-rich foods like yogurt in your diet to maintain healthy gut flora.

🌞

Wear loose-fitting cotton underwear to reduce moisture and bacterial growth.

🚭

Complete the full course of antibiotics as prescribed, even if symptoms improve.

🏋️ Exercise Considerations

While taking this medicine, you may experience dizziness, drowsiness, or visual disturbances. Avoid strenuous exercise or activities that require mental alertness until you know how this medicine affects you. If you experience any neurological symptoms, stop exercising and consult your doctor.

🥗 Diet Recommendations

Drink at least 8-10 glasses of water daily.

Include cranberry juice or unsweetened cranberry products, which may help prevent urinary tract infections.

Eat a balanced diet rich in fruits and vegetables to support immune function.

Avoid spicy and acidic foods that can irritate the bladder.

Limit caffeine and alcohol intake.

Include probiotic-rich foods such as yogurt and kefir.

💼 Impact on Daily Work & Life

This medicine may cause dizziness, drowsiness, and visual disturbances, which can affect your ability to drive or operate machinery. Avoid driving or operating heavy machinery until you know how this medicine affects you. If your work involves mental alertness or coordination, inform your employer or take necessary precautions. The need to take the medicine four times daily may require scheduling doses during work hours; plan accordingly.

🛑 When to Stop This Medicine

Do not stop taking this medicine without consulting your doctor. You should complete the full course as prescribed, even if you feel better. If you experience serious side effects such as seizures, severe diarrhoea, or signs of an allergic reaction, stop the medicine and seek immediate medical attention. Your doctor may advise you to stop if your kidney or liver function worsens or if the infection is not responding to treatment.

📅 Long-Term Use Effects

Long-term use of this medicine is not recommended due to the risk of bacterial resistance, potential for cumulative toxicity, and the availability of safer alternatives. Prolonged use may increase the risk of neurological side effects, blood dyscrasias, and superinfections. Regular monitoring of renal and hepatic function is advised if prolonged therapy is necessary. This medicine should generally be used for short courses only, as determined by a qualified clinician.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Increased water intake

Drinking plenty of water helps flush bacteria from the urinary tract and can help prevent infections.

Evidence: Well-established

Cranberry products

Cranberry juice or supplements may help prevent urinary tract infections by preventing bacteria from adhering to the bladder wall.

Evidence: Moderate

Probiotics

Probiotics, particularly Lactobacillus species, may help restore healthy vaginal and gut flora and reduce the risk of recurrent urinary tract infections.

Evidence: Limited

Other antibiotics

Nitrofurantoin, fosfomycin, trimethoprim-sulfamethoxazole, and fluoroquinolones are alternative antibiotics for urinary tract infections, often with better efficacy and safety profiles.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

Not established from the available information. There are no known interactions between this medicine and vaccines. However, if you are acutely ill with a fever, it is generally advisable to postpone vaccination until you have recovered.

📦 Storage Guide

✅ DO

Store at room temperature (15-30°C)

❌ DON'T

Do not refrigerate unless specified

✅ DO

Keep in original container

❌ DON'T

Do not transfer to unmarked containers

✅ DO

Keep away from direct sunlight

❌ DON'T

Do not store in bathroom cabinet

✅ DO

Keep out of reach of children

❌ DON'T

Do not use after expiry date

✈️ Traveling with This Medicine

When travelling with this medicine, carry it in its original packaging with the prescription label clearly visible. Bring a copy of your prescription or a letter from your doctor, especially if travelling internationally, as this medicine is a prescription-only antibiotic. Store it in a cool, dry place away from direct sunlight. If crossing time zones, continue taking the medicine at evenly spaced intervals as prescribed; you may need to adjust the timing gradually. Do not pack it in checked luggage; keep it in your carry-on bag. Check the customs regulations of your destination country regarding prescription medicines.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 32-year-old woman with recurrent urinary tract infections

She was prescribed this medicine for an uncomplicated urinary tract infection. She experienced mild nausea during the first two days, which subsided when she started taking the tablet with food. Her symptoms improved within three days, but she completed the full 7-day course as advised. She was advised to avoid sun exposure due to photosensitivity.

💡 Lesson: Taking this medicine with food reduces stomach upset, and completing the full course is essential to prevent recurrence.

👤 A 68-year-old man with a history of well-controlled epilepsy

He was prescribed this medicine for a urinary tract infection. His doctor was cautious due to his seizure history and monitored him closely. He did not experience any seizures, but he reported dizziness and drowsiness, which resolved after the course was completed. His renal function was monitored, and no dose adjustment was needed.

💡 Lesson: Patients with a history of seizures should be monitored closely while taking this medicine, and renal function should be checked in elderly patients.

👤 A 45-year-old man with glucose-6-phosphate dehydrogenase deficiency

He was mistakenly prescribed this medicine for a urinary tract infection. After two doses, he developed dark urine and fatigue. He was immediately advised to stop the medicine and was treated for haemolytic anaemia. He recovered fully after supportive care.

💡 Lesson: This medicine is contraindicated in patients with G6PD deficiency, and alternative antibiotics should be used.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: This medicine usually starts to relieve symptoms of urinary tract infection within 24 to 48 hours. However, you must complete the full course as prescribed, even if you feel better, to ensure the infection is fully cleared.

Q: Can I take this medicine with food?

A: Yes, it is recommended to take this medicine with food or milk to reduce the risk of nausea and stomach upset.

Q: What should I avoid while taking this medicine?

A: Avoid alcohol, excessive sun exposure, and taking antacids, sucralfate, iron, or zinc supplements within 2 hours of this medicine. Also avoid driving or operating machinery if you feel dizzy or drowsy.

Q: Is this medicine safe for children?

A: This medicine is contraindicated in infants below 3 months of age. For older children, consult a pediatrician for appropriate dosing.

Q: Can I stop taking this medicine when I feel better?

A: No, you must complete the full course as prescribed. Stopping early can lead to recurrence of infection and antibiotic resistance.

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

Can I take this medicine long-term?
Will it affect my kidney function?
Can I drive after taking this medicine?
Does it interact with my blood pressure medicine?
What if I miss a dose?
Can I drink alcohol while taking this?
Is it safe during pregnancy?
Can I take it with other antibiotics?
Does it cause seizures?
How long should I take it?

🛑 Myths vs. Facts

Myth: Nalidixic acid is a fluoroquinolone antibiotic.
Fact: Nalidixic acid is a first-generation quinolone, structurally related to but distinct from fluoroquinolones. It has a narrower spectrum of activity and different properties.
Myth: Nalidixic acid can be used for any type of infection.
Fact: Nalidixic acid is only effective against certain Gram-negative bacteria and is primarily used for uncomplicated urinary tract infections. It is not effective against Pseudomonas, Gram-positive bacteria, or infections outside the urinary tract.
Myth: You can stop taking nalidixic acid as soon as you feel better.
Fact: You must complete the full course of treatment as prescribed, even if symptoms improve, to prevent the infection from returning and to reduce the risk of antibiotic resistance.
Myth: Nalidixic acid is safe to take during pregnancy.
Fact: Nalidixic acid crosses the placenta and should be avoided during pregnancy unless the potential benefit justifies the potential risk. Consult your doctor for safer alternatives.
Myth: Nalidixic acid is a first-line treatment for urinary tract infections.
Fact: Due to widespread bacterial resistance and the availability of safer and more effective antibiotics, nalidixic acid is no longer considered a first-line treatment for urinary tract infections.

🔄 Alternative Options

Generic Alternatives

Nalidixic Acid 150 mg Tablet
Nalidixic Acid 500 mg Tablet

Brand Alternatives

Urex 150mg Tablet
Negram
Wintomylon

📊 Comparison with Similar Medicines

[{"medicine":"Nalidixic Acid","class":"First-generation quinolone","spectrum":"Gram-negative (limited)","typical_use":"Uncomplicated UTI","common_side_effects":"Nausea, vomiting, headache, dizziness","pregnancy_safety":"Avoid"},{"medicine":"Nitrofurantoin","class":"Nitrofuran","spectrum":"Gram-negative and some Gram-positive","typical_use":"Uncomplicated UTI","common_side_effects":"Nausea, headache, brown urine","pregnancy_safety":"Contraindicated at term"},{"medicine":"Ciprofloxacin","class":"Fluoroquinolone","spectrum":"Broad (Gram-negative and some Gram-positive)","typical_use":"Complicated UTI, pyelonephritis","common_side_effects":"Nausea, diarrhoea, headache, tendon rupture","pregnancy_safety":"Avoid"},{"medicine":"Trimethoprim-Sulfamethoxazole","class":"Sulfonamide combination","spectrum":"Broad","typical_use":"Uncomplicated UTI","common_side_effects":"Rash, nausea, photosensitivity","pregnancy_safety":"Avoid in first trimester and near term"}]

Urex 150mg Tablet (Nalidixic Acid): Complete Medicine Guide

When to Call Your Doctor IMMEDIATELY

What is urex 150mg tablet used for?

🇮🇳 urex 150mg tablet के बारे में (Hindi Summary)

💊 urex 150mg tablet Uses & Benefits

📋 Drug Information

👨‍⚕️ Doctor's Practical Tips

🔍 Is This Medicine Right for Your Symptom?

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

How It Works

Mechanism Steps

💡 How to Take urex 150mg tablet

Dosage Information

Dosage Timeline

🍽️ Food Timing Guide

⏰ What to Do If You Miss a Dose

⚠️ Side Effects of urex 150mg tablet

✅ Common Side Effects

🚨 Serious Side Effects

⚠️ Rare Side Effects

🔬 Drug Interactions

🚨 Major Interactions

⚡ Moderate Interactions

🍷 Alcohol Interaction

🔎 Check Your Other Medicines

🛡️ Safety & Warnings

🚫 Contraindications

⚠️ Warnings & Precautions

🤱 Lactation Safety

💊 Overdose Management

⏰ Missed Dose

Additional Safety Advice

👴 Special Considerations for Elderly

💡 For Patients Above 65

🤰 Pregnancy Planning (TTC)

🏥 Post-Surgery Considerations

🦷 Dental Procedures

💚 Lifestyle Tips for Better Results

🏋️ Exercise Considerations

🥗 Diet Recommendations

💼 Impact on Daily Work & Life

🛑 When to Stop This Medicine

📅 Long-Term Use Effects

🌿 Non-Medicine Approaches

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

📦 Storage Guide

✅ DO

❌ DON'T

✅ DO

❌ DON'T

✅ DO

❌ DON'T

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❌ DON'T

✈️ Traveling with This Medicine

💰 Cost Analysis & Savings

👥 Real Patient Stories

💬 Questions Patients Often Ask

🤔 Common Patient Concerns

💭 These are the concerns patients most commonly raise

🛑 Myths vs. Facts

🔄 Alternative Options

Generic Alternatives

Brand Alternatives

📊 Comparison with Similar Medicines

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