dx lb 100mg capsule - Doxycycline (100mg) + Lactobacillus (60Million spores) medicine

Alidox LB 100mg Tablet: Complete Guide to Uses, Side Effects, and Safety

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🏭 Mednova Laboratories 📦 Varies by brand 💊 Allopathy 📅 Updated: Oct 24, 2026
⚠️ Hepatotoxicity Risk 🤰 Pregnancy Category Doxycycline is not recommended during pregnancy. It crosses the placenta and may cause permanent discoloration of the baby's teeth and affect bone growth. It is generally avoided in pregnancy, especially after 15 weeks. If you are pregnant or planning to become pregnant, inform your doctor before taking this medicine. 📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for indicated uses.
Reviewed by
SaathiMed Expert Panel | Oct 24, 2026
🩺
Medically Fact-Checked & Clinically Verified by SaathiMed Clinical Review Board
Clinical Reference Standards: CDSCO (Central Drugs Standard Control Organisation), Indian Pharmacopoeia (IP) & WHO | Last Updated: September 2026

When to Call Your Doctor IMMEDIATELY

  • Severe or bloody diarrhoea, stomach cramps, or fever
  • Yellowing of skin or eyes, dark urine, or severe abdominal pain
  • Severe headache, blurred vision, or visual disturbances
  • Rash, blistering, or peeling of skin
  • Swelling of face, lips, or throat, or difficulty breathing
  • Unusual bruising or bleeding
  • Chest pain or irregular heartbeat

If experiencing severe symptoms, call emergency services immediately.

What is dx lb 100mg capsule used for?

This medicine is a combination of doxycycline, an antibiotic, and lactobacillus, a probiotic. It is used to treat various bacterial infections and helps protect gut health. Take it exactly as prescribed, with water, and avoid milk or antacids within 2 hours.

  • Generic Name: Doxycycline + Lactobacillus
  • Manufacturer: Mednova Laboratories
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 dx lb 100mg capsule के बारे में (Hindi Summary)

उपयोग: यह दवा डॉक्सीसाइक्लिन और लैक्टोबैसिलस का संयोजन है। यह विभिन्न जीवाणु संक्रमणों जैसे मुँहासे, श्वसन तंत्र संक्रमण, मूत्र मार्ग संक्रमण, क्लैमाइडिया, और मलेरिया की रोकथाम में उपयोग की जाती है। लैक्टोबैसिलस आंतों में अच्छे बैक्टीरिया को बनाए रखने में मदद करता है।

साइड इफेक्ट्स: आम दुष्प्रभावों में मतली, उल्टी, दस्त, पेट दर्द, और भूख में कमी शामिल हैं। कुछ लोगों को धूप से एलर्जी हो सकती है। गंभीर दुष्प्रभाव दुर्लभ हैं लेकिन इनमें गंभीर दस्त, यकृत की समस्या, और त्वचा पर गंभीर प्रतिक्रियाएँ शामिल हो सकती हैं।

सुरक्षा सलाह: इस दवा को पानी के साथ लें और 30 मिनट तक सीधे बैठें या खड़े रहें। दूध, दही, या कैल्शियम युक्त पेय के साथ न लें। धूप से बचें और सनस्क्रीन का उपयोग करें। गर्भवती महिलाओं और 8 वर्ष से कम बच्चों को यह दवा नहीं देनी चाहिए। शराब का सेवन न करें।

💡 Did You Know? Over 80% of the antiretroviral drugs used globally to combat AIDS are supplied by Indian pharmaceutical companies.

💊 dx lb 100mg capsule Uses & Benefits

[{"condition":"Acne vulgaris","description":"Used for moderate to severe inflammatory acne to reduce bacteria and inflammation.","evidence":"Well-established"},{"condition":"Respiratory tract infections","description":"Treats community-acquired pneumonia, bronchitis, and sinusitis caused by susceptible bacteria.","evidence":"Well-established"},{"condition":"Urinary tract infections","description":"Effective against certain urinary tract infections, especially those caused by susceptible organisms.","evidence":"Well-established"},{"condition":"Chlamydia trachomatis infection","description":"First-line treatment for uncomplicated genital chlamydia infection.","evidence":"Well-established"},{"condition":"Rickettsial infections","description":"Treatment of choice for Rocky Mountain spotted fever and other tick-borne rickettsial diseases.","evidence":"Well-established"},{"condition":"Malaria prevention","description":"Used for prophylaxis against malaria in travellers to endemic areas.","evidence":"Well-established"},{"condition":"Lyme disease","description":"Effective for early Lyme disease and some later manifestations.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Rosacea","description":"Sometimes used for its anti-inflammatory effects in rosacea.","evidence":"Limited"},{"condition":"Periodontal disease","description":"Used as an adjunct in treating gum disease.","evidence":"Limited"}]

Primary treatment for: Bacterial infections

Also treats: Acne, Respiratory tract infections, Urinary tract infections, Chlamydia, Rickettsial infections, Malaria prevention, Lyme disease

📋 Drug Information

Generic Name(s)Doxycycline + Lactobacillus
Brand NameAdoxy LB Capsule
ManufacturerMednova Laboratories
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassANTI INFECTIVES
Action ClassTetracycline Antibiotic + Probiotic
Route of AdministrationOral
StorageStore at room temperature between 15°C and 30°C (59°F to 86°F). Protect from light and moisture. Keep in the original container, tightly closed. Do not refrigerate unless specified by the manufacturer.
Shelf LifeThe shelf life is typically 24 months from the date of manufacture. Check the expiry date on the pack before use.
WHO GuidelineDoxycycline is included in the WHO Model List of Essential Medicines for the treatment of several bacterial infections, including cholera, chlamydia, and rickettsial diseases. It is also recommended for malaria prophylaxis in certain regions.
ICMR GuidelineThe Indian Council of Medical Research (ICMR) recommends doxycycline for the treatment of scrub typhus, chlamydia, and other susceptible infections. It is also used for malaria prophylaxis as per national guidelines.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Take this medicine with a full glass of water and remain upright for 30 minutes to prevent esophageal irritation.
2
Avoid taking this medicine with milk, antacids, or iron supplements; separate by at least 2 hours.
3
Use sunscreen and protective clothing because this medicine can make your skin more sensitive to sunlight.
4
Complete the full course as prescribed, even if you feel better after a few days.
5
Inform your doctor if you are pregnant, planning pregnancy, or breastfeeding.
6
Do not share this medicine with others, even if they have similar symptoms.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

✅
Acne
This medicine is commonly prescribed for moderate to severe acne.
Likely Use
✅
Fever with cough
May be used for respiratory tract infections.
Likely Use
✅
Burning urination
May be used for urinary tract infections.
Likely Use
❌
Common cold
This medicine is not effective against viral infections.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionDoxycycline is well absorbed from the gastrointestinal tract after oral administration. Absorption is rapid and nearly complete. Food or milk may slightly reduce absorption but is usually not clinically significant. However, antacids, iron, and calcium can significantly reduce absorption.
DistributionDoxycycline is highly lipophilic and distributes widely into body tissues and fluids, including the liver, kidneys, lungs, spleen, and bile. It also penetrates the cerebrospinal fluid and eye tissues. It crosses the placenta and is excreted in breast milk.
Protein BindingDoxycycline is approximately 90% bound to plasma proteins.
MetabolismDoxycycline is not extensively metabolized in the liver. It undergoes some metabolism, but the exact pathways are not fully established from the available information.
Half-LifeThe elimination half-life of doxycycline is approximately 18 to 22 hours in patients with normal kidney function.
ExcretionDoxycycline is excreted mainly in the bile and feces, with a smaller portion excreted in the urine. It is not significantly affected by renal impairment.
BioavailabilityThe oral bioavailability of doxycycline is approximately 90% to 100%.
Onset of ActionThe onset of action for doxycycline is not immediate. It may take several hours to days to see clinical improvement, depending on the infection being treated.
Peak Plasma TimePeak plasma concentrations of doxycycline are reached about 2 to 3 hours after oral administration.
Duration of ActionThe duration of action of doxycycline is not precisely established from the available information, but its long half-life allows for once or twice daily dosing.

How It Works

Doxycycline is a broad-spectrum tetracycline antibiotic. It works by binding to the 30S ribosomal subunit of susceptible bacteria, blocking the attachment of aminoacyl-tRNA to the mRNA-ribosome complex. This prevents the addition of new amino acids to the growing peptide chain, thereby stopping bacterial protein synthesis. Without proteins, bacteria cannot grow or multiply, and they eventually die. Lactobacillus is a live probiotic that helps maintain the natural balance of beneficial bacteria in the intestines. It does not treat the infection directly but may reduce the risk of antibiotic-associated diarrhoea by competing with harmful bacteria and restoring gut flora.

Mechanism Steps

1
Entry into bacteria: Doxycycline enters bacterial cells through porin channels and energy-dependent transport systems.
2
Binding to ribosome: It binds reversibly to the 30S ribosomal subunit, specifically to the A site.
3
Blocking protein synthesis: This binding prevents aminoacyl-tRNA from attaching to the mRNA-ribosome complex, halting the addition of amino acids to the growing protein chain.
4
Bacterial growth arrest: Without new proteins, bacteria cannot multiply or repair themselves, leading to inhibition of growth.
5
Probiotic effect: Lactobacillus spores germinate in the gut and help restore beneficial bacteria that may be killed by doxycycline.

💡 How to Take dx lb 100mg capsule

Strength: Each tablet contains doxycycline 100 mg and lactobacillus 60 million spores.

1Take the tablet with a full glass of water (about 240 mL).
2Swallow the tablet whole; do not crush or chew.
3Take it with food if it upsets your stomach, but avoid milk, yoghurt, or calcium-fortified drinks.
4Stay upright for at least 30 minutes after taking the tablet.
5Take at evenly spaced intervals as prescribed by your doctor.
6Do not take with antacids, iron supplements, or multivitamins; separate by 2 hours.

Dosage Information

Adult DosageThe usual adult dose of this medicine is one tablet (doxycycline 100 mg with lactobacillus 60 million spores) taken orally once or twice daily, depending on the infection being treated. For acne, the dose is often 100 mg once daily. For acute infections, 100 mg every 12 hours on the first day, then 100 mg once daily or as prescribed. For malaria prevention, 100 mg once daily starting 1-2 days before travel and continuing for 4 weeks after leaving the area. The dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Always follow your doctor's prescription exactly.
Pediatric DosagePediatric dosing is not established from available information. This medicine is contraindicated in children under 8 years of age due to the risk of permanent tooth discoloration and effects on bone growth. Consult a pediatrician for appropriate alternatives.
Elderly DosageElderly patients may be more sensitive to the side effects of this medicine. No specific dose adjustment is usually required, but caution is advised. Monitor renal and hepatic function. The dose must be individualized by a qualified clinician.
Renal ImpairmentNo dose adjustment is usually necessary for mild to moderate renal impairment. In severe renal impairment, caution is advised. The dose must be individualized by a qualified clinician based on renal function.
Hepatic ImpairmentDoxycycline is partially metabolized in the liver. In patients with severe hepatic impairment, dose adjustment may be necessary. The dose must be individualized by a qualified clinician based on hepatic function.
Maximum Daily DoseThe maximum recommended daily dose is 200 mg of doxycycline (two tablets of 100 mg) per day, unless otherwise prescribed by a doctor for specific infections.

Dosage Timeline

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

🍽️ Food Timing Guide

With food
Take with meals if stomach upset occurs
Reduces nausea and stomach pain.
Milk, yoghurt, cheese
Avoid within 2 hours of dose
Calcium reduces absorption of doxycycline.
Antacids, iron supplements
Separate by 2 hours
They bind to doxycycline and reduce its effectiveness.

⏰ 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.

⚠️ Side Effects of dx lb 100mg capsule

✅ Common Side Effects

Nausea (Common (5-10%))
Take with food or milk if not contraindicated. If nausea persists, consult your doctor.
Diarrhoea (Common (5-10%))
Stay hydrated. If diarrhoea is severe or bloody, seek medical advice immediately.
Vomiting (Common (5-10%))
Take with a full glass of water and food. If vomiting occurs soon after taking the dose, consult your doctor.
Stomach pain (Common (5-10%))
Take with food. If pain is severe or persistent, contact your doctor.
Photosensitivity (Common (5-10%))
Use sunscreen and protective clothing. Avoid prolonged sun exposure.

🚨 Serious Side Effects

Clostridioides difficile-associated diarrhoea (Rare (<0.1%))
Seek immediate medical attention if you develop watery or bloody diarrhoea, stomach cramps, or fever.
Severe skin reactions (e.g., Stevens-Johnson syndrome) (Rare (<0.1%))
Stop the medicine and seek emergency care if you notice rash, blistering, or peeling skin.
Liver injury (Rare (<0.1%))
Report yellowing of eyes or skin, dark urine, or severe abdominal pain to your doctor immediately.
Intracranial hypertension (Rare (<0.1%))
Seek medical help if you experience severe headaches, blurred vision, or visual disturbances.
Severe allergic reaction (anaphylaxis) (Rare (<0.1%))
Call emergency services if you have difficulty breathing, swelling of face or throat, or a rapid heartbeat.

⚠️ Rare Side Effects

Blood disorders (e.g., thrombocytopenia)
Report unusual bruising or bleeding to your doctor.
Pancreatitis
Seek medical attention for severe abdominal pain that radiates to the back.
Tooth discoloration
Avoid in children under 8 years. Consult a dentist if concerned.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Warfarin Major
Isotretinoin Major
Antacids Major
Iron supplements Major
Phenytoin Moderate
Carbamazepine Moderate
Rifampin Moderate
Oral contraceptives Moderate
Methotrexate Moderate
Penicillins Minor

🚨 Major Interactions

  • Warfarin
  • Isotretinoin
  • Antacids containing aluminium, calcium, or magnesium
  • Iron supplements
  • Retinoids (e.g., acitretin)

⚡ Moderate Interactions

  • Phenytoin, carbamazepine, rifampin
  • Oral contraceptives
  • Methotrexate

🍷 Alcohol Interaction

It is advisable to avoid alcohol while taking this medicine. Alcohol can increase the risk of stomach upset, dizziness, and may reduce your ability to fight the infection. It can also worsen liver-related side effects.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to doxycycline or other tetracyclines","Pregnancy (especially after 15 weeks)","Breastfeeding (prolonged use)","Children under 8 years of age","Severe liver disease"]

⚠️ Warnings & Precautions

["Take with plenty of water and remain upright for 30 minutes to prevent esophageal irritation.","Avoid sun exposure and use sunscreen due to photosensitivity.","Do not take with milk, antacids, or iron supplements; separate by 2 hours.","May reduce effectiveness of oral contraceptives; use backup contraception.","May cause dizziness; avoid driving or operating machinery until you know how it affects you.","Do not use in children under 8 years due to risk of tooth discoloration.","Inform your doctor if you have liver or kidney disease.","Finish the full course as prescribed, even if you feel better."]

🤱 Lactation Safety

Doxycycline is excreted in breast milk. Short-term use is generally considered acceptable, but prolonged use may cause tooth discoloration and affect bone growth in the nursing infant. Consult your doctor before breastfeeding while on this medicine.

💊 Overdose Management

Overdose of this medicine may cause nausea, vomiting, and diarrhoea. There is no specific antidote. Treatment is supportive and symptomatic. If you suspect an overdose, contact your doctor or a poison control center immediately. Do not induce vomiting unless instructed by a healthcare professional.

⏰ Missed Dose

If you miss a dose, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take two doses at the same time to make up for a missed dose.

Additional Safety Advice

General Safety

Before you start this medicine, tell your doctor if you are pregnant, planning pregnancy, or breastfeeding. This medicine is not safe for unborn babies or infants. Do not take it if you are allergic to doxycycline or other tetracycline antibiotics. Always swallow the tablet whole with plenty of water while sitting or standing, and remain upright for at least thirty minutes. Avoid lying down right after taking it to prevent irritation of the food pipe. Take this medicine with food if it upsets your stomach, but avoid taking it with milk, yoghurt, or calcium-fortified drinks because they reduce absorption. Separate this medicine from antacids, iron supplements, and multivitamins by at least two hours. Use a good sunscreen and wear protective clothing because your skin may become more sensitive to sunlight. Do not drink alcohol while taking this medicine, as it can worsen stomach upset and reduce your energy. Finish the full course even if you feel better after a few days. Stopping early can allow the infection to return and may lead to antibiotic resistance. Keep this medicine out of reach of children.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients may be more prone to side effects like dizziness and photosensitivity. Monitor renal and hepatic function. No specific dose adjustment is usually required, but caution is advised.

🤰 Pregnancy Planning (TTC)

This medicine is not recommended if you are trying to conceive or are pregnant. It can harm the unborn baby. Discuss alternative treatments with your doctor before planning pregnancy.

🏥 Post-Surgery Considerations

If you are scheduled for surgery, inform your surgeon that you are taking this medicine. It may interact with anesthetics or affect wound healing. Your doctor may advise you to stop it before surgery.

🦷 Dental Procedures

Inform your dentist that you are taking this medicine before any dental procedure. It may affect the outcome of certain dental treatments or interact with medications used during the procedure.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy diet rich in fibre to support gut health.
🥗
Stay well hydrated throughout the day.
😴
Use sunscreen and protective clothing when outdoors.
💧
Avoid alcohol while taking this medicine.
🧘
Get adequate rest to help your body fight the infection.
🌞
Practice good hygiene to prevent the spread of infection.

🏋️ Exercise Considerations

This medicine may cause dizziness or photosensitivity. Avoid strenuous outdoor exercise during peak sun hours. If you feel dizzy, avoid exercising until the effect wears off.

🥗 Diet Recommendations

Include probiotic-rich foods like yoghurt, but separate from the dose by 2 hours.
Eat a balanced diet with plenty of fruits and vegetables.
Avoid spicy and oily foods if you have stomach upset.
Stay hydrated with water and clear fluids.

💼 Impact on Daily Work & Life

This medicine may cause dizziness or sensitivity to sunlight, which could affect your ability to drive or operate machinery. Avoid driving until you know how it affects you. Take precautions if your work involves outdoor activities.

🛑 When to Stop This Medicine

Do not stop taking this medicine without consulting your doctor. Complete the full course as prescribed. If you experience severe side effects, contact your doctor immediately; they may advise you to stop.

📅 Long-Term Use Effects

Long-term use of this medicine may lead to antibiotic resistance, gut flora imbalance, and rare side effects like liver injury or intracranial hypertension. It should only be used for as long as prescribed. Regular monitoring may be needed if used for prolonged periods.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Other antibiotics

Depending on the infection, alternative antibiotics like azithromycin or amoxicillin may be used.

Evidence: Well-established
Probiotic supplements

Can be taken separately to support gut health during antibiotic therapy.

Evidence: Limited

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

This medicine does not interact with most vaccines. However, it may reduce the effectiveness of live bacterial vaccines like typhoid. Consult your doctor for specific advice.

📦 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

✈️ Traveling with This Medicine

When travelling, carry this medicine in its original packaging with a copy of your prescription. Store it at room temperature and protect it from extreme heat or moisture. If crossing time zones, adjust dosing times gradually as advised by your doctor. For malaria prevention, start before travel and continue after return as prescribed. Check customs regulations for carrying prescription medicines.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 28-year-old woman with acne
She was prescribed this medicine for moderate acne. She took it daily with water and avoided milk products within 2 hours. After 6 weeks, her acne improved significantly. She experienced mild nausea initially, which subsided when she took it with food.
💡 Lesson: Consistent use and avoiding dairy around the dose improves effectiveness and reduces stomach upset.
👤 A 45-year-old man travelling to a malaria-endemic area
He was prescribed this medicine for malaria prevention. He started it 2 days before travel and continued for 4 weeks after returning. He used sunscreen and avoided alcohol. He did not contract malaria and had no significant side effects.
💡 Lesson: Adhering to the prophylaxis schedule and sun protection is key to preventing malaria and avoiding side effects.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: You may start feeling better within 1-2 days, but it may take several days to weeks for full effect, depending on the infection.

Q: Can I take this medicine with milk?

A: No, milk and dairy products can reduce the absorption of doxycycline. Take with water and avoid dairy within 2 hours.

Q: Is it safe during pregnancy?

A: No, this medicine is not recommended during pregnancy as it can harm the unborn baby. Consult your doctor for alternatives.

Q: Can I stop taking it when I feel better?

A: No, you must complete the full course as prescribed to prevent the infection from returning and to avoid 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?
  • Does it affect birth control pills?

🔄 Substitutes for dx lb 100mg capsule

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: This medicine can be taken with milk to reduce stomach upset.
    Fact: Milk reduces the absorption of doxycycline. Take with water and food, but avoid milk within 2 hours.
  • Myth: You can stop taking this medicine once you feel better.
    Fact: You must complete the full course as prescribed to prevent the infection from returning and to avoid antibiotic resistance.
  • Myth: This medicine is safe for children.
    Fact: It is not safe for children under 8 years due to the risk of permanent tooth discoloration.
  • Myth: This medicine can be used for any type of infection.
    Fact: It is only effective against bacterial infections. It does not treat viral infections like the common cold or flu.

🔄 Alternative Options

Generic Alternatives

  • Doxycycline 100 mg + Lactobacillus 60 million spores tablet

Brand Alternatives

  • Alidox LB 100mg Tablet

📊 Comparison with Similar Medicines

[{"medicine":"Doxycycline alone","difference":"Does not contain lactobacillus; may cause more gut side effects."},{"medicine":"Doxycycline + Lactobacillus","difference":"Combines antibiotic with probiotic to reduce gut side effects."}]

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