aciloc 300 tablet - Ranitidine (300mg) medicine

Aciloc 300 Tablet (Ranitidine 300mg): Complete Guide

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🏭 Cadila Pharmaceuticals Ltd 📦 Varies by brand 💊 Allopathy 📅 Updated: Sep 24, 2026
📋 Prescription Required 💊 Generic Available
Medically Reviewed
11 min read
Evidence: Well-established for approved indications.
Reviewed by
SaathiMed Expert Panel | Sep 24, 2026

When to Call Your Doctor IMMEDIATELY

  • Blood in vomit or black, tarry stools
  • Severe abdominal pain that does not go away
  • Difficulty breathing or swelling of face, lips, or throat
  • Yellowing of skin or eyes (jaundice)
  • Confusion, hallucinations, or extreme drowsiness
  • Unusual bruising or bleeding
  • Fever with sore throat or mouth ulcers
  • Chest pain or irregular heartbeat

If experiencing severe symptoms, call emergency services immediately.

What is aciloc 300 tablet used for?

This medicine contains ranitidine 300 mg, an H2 blocker that reduces stomach acid. It treats ulcers, GERD, and other acid-related conditions. It is taken orally, usually once daily at bedtime or as prescribed. It works within 1 hour and lasts up to 12 hours.

  • Generic Name: Ranitidine
  • Manufacturer: Cadila Pharmaceuticals Ltd
  • Form: Allopathy
  • Pregnancy Category: Consult doctor
  • Prescription Required: Yes

🇮🇳 aciloc 300 tablet के बारे में (Hindi Summary)

उपयोग: यह दवा रैनिटिडीन 300 मिलीग्राम युक्त एक ओरल टैबलेट है, जिसका उपयोग पेट के अल्सर, एसिड रिफ्लक्स (जीईआरडी), और अम्लता से जुड़ी अन्य समस्याओं के इलाज के लिए किया जाता है। यह पेट में एसिड का उत्पादन कम करती है, जिससे जलन और दर्द में राहत मिलती है और घाव भरने लगते हैं। इसे डॉक्टर के निर्देशानुसार ही लें।

साइड इफेक्ट्स: आमतौर पर यह दवा सुरक्षित मानी जाती है, लेकिन कुछ लोगों को सिरदर्द, चक्कर आना, कब्ज, दस्त, या पेट में असहजता हो सकती है। ये लक्षण आमतौर पर हल्के होते हैं और अपने आप ठीक हो जाते हैं। यदि आपको असामान्य खून बहना, चकत्ते, सूजन, या सांस लेने में कठिनाई हो, तो तुरंत डॉक्टर से संपर्क करें।

सुरक्षा सलाह: इस दवा को डॉक्टर के बताए अनुसार ही लें। इसे पानी के साथ पूरा निगलें, चबाएं नहीं। इसे भोजन के साथ या बिना भोजन के लिया जा सकता है, लेकिन हर दिन एक ही समय पर लें। शराब और धूम्रपान से बचें क्योंकि ये पेट की जलन बढ़ा सकते हैं। यदि आपको गुर्दे या यकृत की समस्या है, तो डॉक्टर को बताएं। अन्य दवाओं के साथ लेने से पहले डॉक्टर से सलाह लें। बच्चों की पहुंच से दूर रखें।

💡 Did You Know? India has the highest number of USFDA-compliant plants outside the USA.

💊 aciloc 300 tablet Uses & Benefits

[{"condition":"Duodenal ulcer","description":"This medicine is used to treat active duodenal ulcers and to prevent their recurrence by reducing stomach acid.","evidence":"Well-established"},{"condition":"Gastric ulcer","description":"It helps heal benign gastric ulcers and relieve associated pain by decreasing acid secretion.","evidence":"Well-established"},{"condition":"Gastroesophageal reflux disease (GERD)","description":"This medicine reduces heartburn and acid regurgitation by lowering stomach acid production.","evidence":"Well-established"},{"condition":"Zollinger-Ellison syndrome","description":"It is used to manage excessive acid secretion in this rare condition.","evidence":"Well-established"},{"condition":"Erosive esophagitis","description":"This medicine helps heal acid-induced damage to the esophagus.","evidence":"Well-established"}]

Off-label uses: [{"condition":"Prevention of stress ulcers in critically ill patients","description":"Sometimes used off-label in hospital settings to prevent stress-related gastrointestinal bleeding.","evidence":"Limited"},{"condition":"Chronic urticaria","description":"Occasionally used off-label as an add-on therapy for hives that do not respond to antihistamines.","evidence":"Limited"}]

Primary treatment for: Peptic ulcer disease

Also treats: Gastroesophageal reflux disease (GERD), Zollinger-Ellison syndrome, Erosive esophagitis

📋 Drug Information

Generic Name(s)Ranitidine
Brand NameAciloc 150 Tablet
ManufacturerCadila Pharmaceuticals Ltd
Packaging / FormVaries by brand (Allopathy)
Therapeutic ClassGASTRO INTESTINAL
Action ClassH2 Receptor Blocker
Route of AdministrationOral
StorageStore at room temperature between 15°C and 30°C (59°F to 86°F). Keep in a dry place, away from direct sunlight and moisture. Keep out of reach of children.
Shelf Life24 months from the date of manufacture.
WHO GuidelineNot established from the available information.
ICMR GuidelineNot established from the available information.

👨‍⚕️ Doctor's Practical Tips

Evidence-based practical advice from experienced clinicians

1
Take this medicine at the same time each day to maintain consistent acid suppression.
2
If you experience stomach upset, take it with a meal or snack.
3
Avoid alcohol and smoking as they can worsen your condition and reduce the medicine's effectiveness.
4
Do not stop taking this medicine abruptly without consulting your doctor, especially if you have an ulcer.
5
Report any unusual bruising, bleeding, or signs of infection to your doctor promptly.
6
If you have kidney problems, your doctor may need to adjust your dose.
7
Keep a symptom diary to track your progress and share it with your doctor.

🔍 Is This Medicine Right for Your Symptom?

Educational reference. Always consult a doctor for diagnosis.

Heartburn
This medicine is commonly prescribed for this.
Likely Use
Stomach ulcer pain
This medicine helps heal ulcers and relieve pain.
Likely Use
Fever
This medicine is not a fever reducer.
Not Primary
Headache
This medicine is not a painkiller for headaches.
Not Primary

🔬 How This Medicine Works (Pharmacology)

Pharmacokinetics

AbsorptionThis medicine is rapidly absorbed from the gastrointestinal tract after oral administration. The absolute bioavailability is approximately 50% due to first-pass metabolism. Food does not significantly affect the extent of absorption, but it may slightly delay the time to peak concentration.
DistributionThis medicine is widely distributed throughout the body, including into breast milk. It crosses the placenta. The volume of distribution is approximately 1.4 L/kg. It does not significantly bind to plasma proteins.
Protein BindingApproximately 15% bound to plasma proteins.
MetabolismThis medicine undergoes hepatic metabolism, primarily by oxidation to N-oxide, S-oxide, and desmethyl ranitidine. The metabolites are largely inactive. The cytochrome P450 system is minimally involved, which contributes to a low potential for drug interactions.
Half-LifeThe elimination half-life is approximately 2 to 3 hours in healthy adults. It is prolonged in patients with renal impairment.
ExcretionThis medicine and its metabolites are primarily excreted in the urine. About 30% of an oral dose is excreted unchanged in the urine. Renal clearance is the major route of elimination.
BioavailabilityThe oral bioavailability is approximately 50%.
Onset of ActionAcid suppression begins within 1 hour after oral administration.
Peak Plasma TimePeak plasma concentrations are reached 1 to 3 hours after oral administration.
Duration of ActionThe duration of acid suppression is dose-dependent and typically lasts up to 12 hours for a 300 mg dose.

How It Works

This medicine works by competitively blocking histamine H2 receptors located on the parietal cells of the stomach. By binding to these receptors, it prevents histamine from stimulating acid production. This leads to a reduction in both basal and stimulated gastric acid secretion, including that triggered by food, caffeine, and other stimuli. As a result, the stomach lining is less irritated, and ulcers and inflamed tissues have a chance to heal. The effect is reversible and dose-dependent.

Mechanism Steps

1
Binding to H2 receptors: This medicine binds reversibly to histamine H2 receptors on the basolateral membrane of gastric parietal cells.
2
Blockade of histamine action: By occupying the receptor, it prevents histamine from stimulating the cell, thereby reducing cyclic AMP production.
3
Reduced acid secretion: The decrease in cyclic AMP leads to less activation of proton pumps, resulting in reduced secretion of hydrogen ions into the stomach lumen.
4
Healing environment: With less acid, the stomach and esophageal tissues are less irritated, allowing ulcers and inflammation to heal.

💡 How to Take aciloc 300 tablet

Strength: Immediate-release oral tablet containing 300 mg of ranitidine.

1Swallow the tablet whole with a full glass of water.
2Do not crush, chew, or break the tablet.
3Take at the same time each day to maintain steady levels.
4You may take it with or without food.
5If it upsets your stomach, take it with a meal or snack.
6Follow your doctor's instructions exactly.

Dosage Information

Adult DosageThe usual adult dose for active duodenal ulcer is 300 mg once daily at bedtime or 150 mg twice daily. For maintenance, 150 mg at bedtime is common. For GERD, 150 mg twice daily is often used. The dose must be individualized by a qualified clinician based on indication, age, weight, renal and hepatic function. Do not self-adjust the dose.
Pediatric DosagePediatric dosing is not established from available information. Consult a pediatrician.
Elderly DosageElderly patients may have reduced renal function, which can increase the risk of side effects. Dose adjustment may be necessary based on renal function. Consult your doctor for appropriate dosing.
Renal ImpairmentIn patients with moderate to severe renal impairment (creatinine clearance less than 50 mL/min), the dose should be reduced. The usual recommendation is 150 mg once daily or 150 mg every 24 hours. For severe impairment, further reduction may be needed. Consult your doctor for individualized dosing.
Hepatic ImpairmentIn patients with hepatic impairment, no specific dose adjustment is usually required, but caution is advised. Monitor for side effects. Consult your doctor.
Maximum Daily DoseThe maximum recommended daily dose is 300 mg for most indications, but higher doses may be used in Zollinger-Ellison syndrome under close medical supervision.

Dosage Timeline

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

🍽️ Food Timing Guide

With food
May take with or without food
Food does not significantly affect absorption.
Caffeine
Limit intake
Caffeine can increase stomach acid and may reduce the medicine's effect.
Alcohol
Avoid
Alcohol increases stomach acid and may worsen your condition.

⏰ 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 aciloc 300 tablet

✅ Common Side Effects

Headache (Common (1-5%))
Usually resolves on its own. If persistent or severe, consult your doctor.
Dizziness (Common (1-5%))
Avoid driving or operating machinery until you know how this medicine affects you.
Constipation (Common (1-5%))
Increase fiber and fluid intake. Consult your doctor if it persists.
Diarrhea (Common (1-5%))
Stay hydrated. Seek medical advice if diarrhea is severe or persistent.
Stomach discomfort (Common (1-5%))
Take with food to minimize discomfort. Report if it worsens.

🚨 Serious Side Effects

Confusion or hallucinations (Rare (<0.1%))
Seek immediate medical attention, especially in elderly or kidney-impaired patients.
Blood disorders (e.g., thrombocytopenia, leukopenia) (Rare (<0.1%))
Report unusual bruising, bleeding, fever, or sore throat to your doctor immediately.
Slow heart rate (bradycardia) (Rare (<0.1%))
Seek medical attention if you experience fainting, dizziness, or palpitations.
Hepatitis (Rare (<0.1%))
Report yellowing of skin or eyes, dark urine, or severe abdominal pain immediately.
Anaphylaxis (Very rare (<0.01%))
Call emergency services if you experience swelling of face, lips, throat, or difficulty breathing.

⚠️ Rare Side Effects

Gynecomastia
Consult your doctor if breast enlargement occurs; dose reduction or discontinuation may be needed.
Vitamin B12 deficiency
Long-term use may require monitoring of B12 levels; consult your doctor.
Acute porphyria
Avoid this medicine if you have a history of porphyria; seek immediate care if symptoms occur.

Consult your doctor if you experience any unusual symptoms.

🔬 Drug Interactions

Drug Severity Effect
Ketoconazole Major
Itraconazole Major
Atazanavir Major
Warfarin Moderate
Phenytoin Moderate
Theophylline Moderate
Antacids Minor
Metoclopramide Minor

🚨 Major Interactions

  • Ketoconazole
  • Itraconazole
  • Atazanavir

⚡ Moderate Interactions

  • Warfarin
  • Phenytoin
  • Theophylline

🍷 Alcohol Interaction

Avoid alcohol while taking this medicine. Alcohol increases stomach acid production and can irritate the stomach lining, which may reduce the effectiveness of this medicine and worsen your symptoms. It can also increase the risk of stomach bleeding.

🔎 Check Your Other Medicines

Educational tool. Always confirm with your doctor or pharmacist.

🛡️ Safety & Warnings

🚫 Contraindications

["Known hypersensitivity to ranitidine or any component of the formulation","History of acute porphyria"]

⚠️ Warnings & Precautions

["Use with caution in patients with renal impairment; dose reduction may be necessary.","Use with caution in patients with hepatic impairment.","Elderly patients may be more susceptible to confusion and other central nervous system effects.","This medicine may mask symptoms of stomach cancer; ensure malignancy is ruled out before starting treatment.","Do not use for prolonged periods without medical supervision.","Avoid alcohol and smoking as they may worsen your condition.","Inform your doctor if you are pregnant, planning to become pregnant, or breastfeeding.","Keep out of reach of children."]

🤱 Lactation Safety

This medicine is excreted in human breast milk. It is generally considered safe for use during breastfeeding, but the amount ingested by the infant is small. However, consult your doctor before use, as monitoring of the infant for potential side effects may be advised.

💊 Overdose Management

Overdose with this medicine is rare and usually produces no severe symptoms. However, if a large amount is ingested, seek immediate medical attention. Treatment is supportive and symptomatic. Gastric lavage may be considered if the overdose is recent. Monitor vital signs and provide supportive care. There is no specific antidote.

⏰ 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 double the dose to make up for a missed one.

Additional Safety Advice

General Safety

Take this medicine exactly as prescribed by your doctor. Do not increase or decrease the dose without medical advice. Swallow the tablet whole with a glass of water; do not crush or chew it. You may take it with or without food, but taking it at the same time each day helps maintain steady levels. Avoid alcohol while taking this medicine because it can worsen stomach irritation and increase acid production. Do not smoke, as smoking increases stomach acid and may reduce the effectiveness of this medicine. If you have kidney or liver problems, your doctor may need to adjust your dose. Inform your doctor about all other medicines you are taking, especially ketoconazole, itraconazole, atazanavir, or blood thinners. Do not use this medicine for longer than recommended without consulting your doctor. Keep this medicine out of reach of children and store it at room temperature away from moisture and heat. If you miss a dose, take it as soon as you remember, but skip it if it is almost time for your next dose. Never double the dose to make up for a missed one.

👴 Special Considerations for Elderly

💡 For Patients Above 65

Elderly patients are more likely to experience confusion, dizziness, and other central nervous system effects. Dose adjustment may be needed based on kidney function. Regular monitoring is advised.

🤰 Pregnancy Planning (TTC)

If you are planning to become pregnant, consult your doctor before taking this medicine. It is classified as Pregnancy Category B, meaning it is generally considered safe, but use only if clearly needed. Your doctor will weigh the benefits and risks.

🏥 Post-Surgery Considerations

This medicine may be used after surgery to prevent stress ulcers. Follow your doctor's instructions carefully. Inform your surgeon if you are taking this medicine before any surgery.

🦷 Dental Procedures

Inform your dentist if you are taking this medicine. It does not usually interfere with dental procedures, but your dentist may need to know for your safety.

💚 Lifestyle Tips for Better Results

🏃
Maintain a healthy weight to reduce pressure on your stomach.
🥗
Eat smaller, more frequent meals instead of large ones.
😴
Avoid lying down for at least 2-3 hours after eating.
💧
Elevate the head of your bed to reduce night-time reflux.
🧘
Quit smoking and avoid alcohol.
🌞
Manage stress through relaxation techniques like deep breathing or yoga.

🏋️ Exercise Considerations

Moderate exercise is generally safe while taking this medicine. However, if you experience dizziness or fatigue, avoid strenuous activities until you know how the medicine affects you. Consult your doctor before starting any new exercise regimen.

🥗 Diet Recommendations

Avoid spicy, fatty, and fried foods.
Limit caffeine and carbonated drinks.
Eat plenty of fiber-rich fruits and vegetables.
Stay well hydrated with water.
Avoid late-night snacks.

💼 Impact on Daily Work & Life

This medicine may cause dizziness in some people. If affected, avoid driving or operating heavy machinery until you know how it affects you. Otherwise, it usually does not interfere with daily activities.

🛑 When to Stop This Medicine

Do not stop taking this medicine without consulting your doctor. If you experience severe side effects or your symptoms worsen, contact your doctor immediately. Your doctor will advise you on when and how to safely stop.

📅 Long-Term Use Effects

Long-term use of this medicine may rarely lead to vitamin B12 deficiency, breast enlargement in men, or blood disorders. Regular monitoring by your doctor is advised if you need to take it for an extended period. Do not use it for longer than recommended without medical supervision.

🌿 Non-Medicine Approaches

These can complement medicine but do not replace prescribed treatment.

Proton pump inhibitors (PPIs)

Medicines like omeprazole or pantoprazole may be used if H2 blockers are not effective.

Evidence: Well-established
Lifestyle modifications

Diet changes, weight loss, and avoiding trigger foods can help manage acid reflux.

Evidence: Well-established
Surgery

In severe cases, surgery may be considered for GERD or ulcers.

Evidence: Well-established

💉 Vaccination Considerations

💉 If You're Getting Vaccinated

There are no known interactions between this medicine and vaccines. You can receive vaccinations as scheduled. Consult your doctor if you have any concerns.

📦 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 traveling, carry this medicine in its original packaging with a copy of your prescription. Keep it in your carry-on luggage to avoid loss. Store at room temperature and protect from extreme heat or moisture. If crossing time zones, adjust your dosing schedule gradually; consult your doctor for specific advice. Check local customs regulations regarding prescription medicines before you travel.

💰 Cost Analysis & Savings

👥 Real Patient Stories

Educational, anonymized scenarios. Individual results may vary.

👤 A 45-year-old man with a history of duodenal ulcer
He was prescribed this medicine 300 mg at bedtime. After two weeks, his night-time stomach pain significantly reduced. He also quit smoking and avoided alcohol, which helped his ulcer heal faster. He completed the full course as advised.
💡 Lesson: Taking the medicine regularly and making lifestyle changes like quitting smoking and avoiding alcohol can greatly improve ulcer healing.
👤 A 60-year-old woman with GERD and mild kidney impairment
She was started on a lower dose of this medicine due to her kidney function. She experienced relief from heartburn within a few days. Her doctor monitored her kidney function regularly and adjusted the dose as needed.
💡 Lesson: Dose adjustment is important in kidney disease to avoid side effects and ensure safety.

💬 Questions Patients Often Ask

Q: How long does it take to work?

A: This medicine starts reducing stomach acid within 1 hour after taking it. You may feel relief from heartburn and pain within a few hours, but full healing of ulcers may take several weeks.

Q: Can I take this medicine every day?

A: Yes, but only as prescribed by your doctor. Long-term daily use should be monitored by a healthcare professional.

Q: What should I do if I miss a dose?

A: 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 double the dose.

Q: Is it safe to take with other medicines?

A: This medicine can interact with certain drugs like ketoconazole, itraconazole, atazanavir, warfarin, phenytoin, and theophylline. Always inform your doctor about all medicines you are taking.

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

A: Do not stop without consulting your doctor. Completing the full course is important to ensure proper healing and prevent recurrence.

🤔 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 antacids?

🔄 Substitutes for aciloc 300 tablet

View All

Alternative brands with exact same active ingredient:

Medical Note: Always consult your doctor before switching medications.

🛑 Myths vs. Facts

  • Myth: Aciloc 300 is a painkiller.
    Fact: It is not a painkiller; it reduces stomach acid to treat acid-related conditions.
  • Myth: You can stop taking it as soon as you feel better.
    Fact: You should complete the full course as prescribed to ensure proper healing and prevent recurrence.
  • Myth: It is safe to take indefinitely without monitoring.
    Fact: Long-term use should be monitored by a doctor due to potential side effects.

🔄 Alternative Options

Generic Alternatives

  • Ranitidine 300 mg tablet

Brand Alternatives

  • Aciloc 300 tablet

📊 Comparison with Similar Medicines

[{"medicine":"Ranitidine","class":"H2 blocker","onset":"1 hour","duration":"Up to 12 hours","common_use":"Ulcers, GERD"},{"medicine":"Famotidine","class":"H2 blocker","onset":"1 hour","duration":"10-12 hours","common_use":"Ulcers, GERD"},{"medicine":"Omeprazole","class":"Proton pump inhibitor","onset":"1 hour","duration":"24 hours","common_use":"Ulcers, GERD"}]

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