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Introduction About RANTAC 150MG TABLET
Rantac 150mg Tablet contains Ranitidine, a compound that supports acid balance in the stomach. Commonly recommended during acidity-related discomfort like peptic/intestinal ulcers, this tablet is often used under doctor supervision as part of daily digestive health support.
RANTAC 150MG TABLET is also used to manage reflux oesophagitis and Zollinger-Ellison Syndrome (small tumour in the first part of your intestine due to excessive gastrin secretion).
Your doctor may occasionally perform tests to make sure RANTAC 150MG TABLET is working and to manage side effects. Visit your doctor routinely for a check-up.
Avoid smoking during the treatment, as it may delay healing or worsen the ulcers. Inform your doctor if you have stomach cancer, kidney, lung or immunity problems, porphyria (rare blood disorder) or diabetes.
RANTAC 150MG TABLET is not recommended for use in pregnant or breastfeeding women unless your doctor finds it essential. Your doctor will determine a proper dose depending on your child’s age, body weight and disease condition. Contact your doctor if you experience any side effects or if any of the symptoms worsen.
Uses Of RANTAC 150MG TABLET
Manages:
- Peptic/intestinal, benign and post-operative ulcers
- reflux oesophagitis
- Zollinger-Ellison Syndrome
Benefits of RANTAC 150MG TABLET
1. Helps Maintain Gastric Acid Balance
Rantac 150mg contains ranitidine, an H2 receptor blocker that reduces the production of excess acid in the stomach, supporting a more balanced digestive environment.
2. Supports Comfort After Meals
When taken before or after food (as directed), it may help ease common stomach discomfort related to acid buildup—especially during irregular eating or spicy meals.
3. Day or Night Use Flexibility
Can be used at night or during the day, depending on your physician’s recommendation—making it easier to manage stomach wellness in sync with daily routines.
4. Prescription Support for Acid-Related Concerns
Often advised alongside other medications as part of an overall plan to reduce gastric acid sensitivity or occasional acid overload—under healthcare supervision.
5. Backed by Decades of Clinical Use
Ranitidine has been used globally for years, with its mechanism well understood by healthcare professionals. Many patients are already familiar with its tolerability profile.
6. Available in Multiple Dosage Forms
Rantac is available in tablets, syrup, and other forms—offering flexibility for different age groups and preferences.
7. Compact, Travel-Friendly Pack
Comes in a blister strip or bottle that fits easily into small bags, supporting use during travel or office hours when prescribed.
How RANTAC 150MG TABLET Works
Ranitidine belongs to a group of medicines called H2-receptor antagonists (also called H2 blockers). These medicines are designed to reduce the natural production of stomach acid.
- Histamine in the stomach binds to H2 receptors on specialized cells in your stomach lining.
- This binding triggers acid secretion into the stomach.
- Ranitidine blocks H2 receptors – preventing histamine from activating them.
- As a result, less acid is produced, helping reduce stomach acidity levels.
How to use RANTAC 150MG TABLET
How to Take Rantac 150mg Tablet Safely
Swallow Rantac 150mg whole with a glass of water. Avoid crushing or chewing the tablet. It may be advised to take it before meals or at bedtime, based on your doctor's instructions. Staying upright for at least 30 minutes post-dose is considered helpful for stomach comfort.
What Is the Recommended Dosage for Rantac 150?
The commonly advised adult dosage for Rantac 150mg may vary depending on your health condition and doctor’s assessment. It is typically suggested once or twice a day — either before meals or at bedtime. Always follow your healthcare provider’s instructions.
Should Rantac Be Taken With Food or On an Empty Stomach?
Rantac 150mg is generally taken 15–30 minutes before a meal, especially if meal-related symptoms are a concern. Taking it on an empty stomach may allow it to work faster, but follow your doctor’s timing guidance.
How Often Can Rantac 150 Be Taken in a Day?
Rantac 150mg may be advised once or twice daily, depending on your individual health plan. Avoid taking more than advised. Keep a minimum 8–12 hour gap between doses if advised twice daily.
When Is the Best Time to Take Rantac 150mg?
Depending on the reason it is prescribed, it may be best taken:
- Before meals to support digestion-related discomfort
- At bedtime to manage overnight gastric discomfort
Consult your healthcare provider for specific timing based on your symptoms and lifestyle.
Can Rantac Be Taken at Night or Before Bed?
Yes, in some cases, a bedtime dose of Rantac 150mg may be advised to support overnight comfort. This is particularly useful if night-time stomach issues are frequent. Take it with water and avoid lying down immediately after.
What if I forgot to take RANTAC 150MG TABLET
If you miss a dose, take it as soon as you remember. If it is nearly time for your next dose, skip the missed one — do not double the dose. Keep a note or set reminders to maintain consistency.
Side Effects Of RANTAC 150MG TABLET
Uncommon
- stomach pain
- constipation
- nausea
When to consult your doctor?
- allergic reactions (rash, itching, hives, swelling of the face, lips, tongue or other body parts, chest pain, wheezing or breathing difficulties, feeling faint especially when standing up, unexplained fever)
- kidney problems (changes in the amount and colour of urine you pass leading to back pain, fever, pain when urinating, blood in urine and changes in the blood test)
- pancreatitis (severe stomach pain)
- irregular or slow heartbeat
- pain or indigestion occurring during management
- beginning to vomit blood or food
- passing black (blood-stained) stools
How To Manage Side Effects
Constipation
- Increase fiber intake with fruits (like papaya), vegetables, whole grains, and legumes.
- Drink 8–10 glasses of water daily to keep stool soft and easy to pass.
- Move regularly – light exercise like walking or yoga helps bowel movements.
- Use natural lubricants like a spoon of warm ghee or flaxseed oil (if permitted).
- Warm beverages in the morning (like lemon water or herbal tea) may stimulate the bowel.
- Establish a routine – try to use the washroom at the same time daily.
- Avoid holding it in – delaying bowel movement can worsen the issue.
Nausea And Vomiting
- Take small, frequent sips of water or oral rehydration solutions.
- Stick to bland foods like toast, crackers, or boiled rice.
- Try natural remedies like ginger tea or sucking on peppermint.
- Avoid strong odors and stay in well-ventilated areas.
- Rest in an upright position and avoid lying down immediately after eating.
- Eat slowly and in small portions to avoid triggering the sensation.
- Avoid scrolling or watching screens while eating, as motion can worsen it.
Stomach Pain
- Use a warm compress or heating pad on your abdomen to ease cramps.
- Eat light, non-greasy meals — avoid spicy, oily, or acidic foods.
- Stay hydrated with warm fluids like soups or herbal teas.
- Sit upright after eating to help digestion and reduce pressure.
- Avoid carbonated drinks or heavy dairy if they worsen your symptoms.
- Practice deep breathing or gentle yoga stretches to ease tension.
- Note your triggers (specific foods, stress, etc.) to avoid future episodes.
Warning & Precautions
Pregnancy
ContraindicatedRANTAC 150MG TABLET is not recommended for use in pregnant women unless considered clearly necessary. Available observational data from pregnant women did not show a consistent link between ranitidine use and major birth defects. Ranitidine has been categorized historically as FDA Pregnancy Category B, which means Animal studies did not show harm to the fetus and well-controlled human studies are limited. Consult your doctor before taking it.
Breastfeeding
ContraindicatedRANTAC 150MG TABLET is not recommended for use in breastfeeding women unless considered clearly necessary as ranitidine is excreted into human breast milk, but the amounts are very low. Consult your doctor before taking it.
Driving and Using Machines
Consult your doctorRANTAC 150MG TABLET has no or negligible effect on driving or using any heavy machineries.
Kidney
Use with CautionRANTAC 150MG TABLET should be taken cautiously in patients with kidney problems. Consult your doctor before taking it.
Liver
Use with CautionRANTAC 150MG TABLET should be taken cautiously in patients with liver disease. Consult your doctor before taking it.
Allergy
ContraindicatedDo not take RANTAC 150MG TABLET if you are allergic to Ranitidine or any of the other ingredients of this medicine.
Lungs
Use with CautionRANTAC 150MG TABLET should be taken cautiously in patients with lung disease, cough or chest infection. Consult your doctor before taking it.
Use In Pediatrics
Consult your doctorYour physician will prescribe the right dose of RANTAC 150MG TABLET depending on age, body weight and health condition of your child. Consult your child’s doctor for advice.
Use In Geriatrics
Use with CautionRANTAC 150MG TABLET should be used cautiously in elderly patients (aged above 65 years). Consult your doctor before taking it.
Other Warnings for RANTAC 150MG TABLET
Before taking RANTAC 150MG TABLET, inform your doctor if you:
- have a history of stomach ulcers
- have stomach cancer
- have acute porphyria (a rare genetic condition)
- have diabetes (high blood sugar)
- have problems with your immune system
Diet and Lifestyle Advice
Recommended Diet Tips While Using Rantac
|
Tip |
Explanation |
|
Choose smaller, frequent meals |
Helps avoid stomach overload and reduces acid build-up. |
|
Opt for low-fat, easy-to-digest foods |
Steamed veggies, boiled rice, oats, and soups are gentle on the stomach. |
|
Stay hydrated with lukewarm water |
Hydration supports digestion and reduces acid concentration. |
|
Consume non-citrus fruits |
Bananas, melons, and papayas may help maintain digestive balance. |
|
Include gut-friendly foods |
Plain yogurt, buttermilk, and fiber-rich vegetables support overall gut health. |
|
Limit caffeine and carbonated beverages |
These may increase stomach acid levels and cause discomfort. |
|
Avoid spicy, deep-fried, and very sour foods |
May aggravate acid irritation despite taking Rantac. |
Lifestyle Tips to Complement Rantac Use
|
Habit |
Benefit |
|
Sit upright for at least 30 minutes after meals |
Helps prevent acid from flowing back into the food pipe. |
|
Maintain a regular eating and sleeping schedule |
Supports your digestive rhythm and minimizes acid fluctuations. |
|
Wear loose-fitting clothes |
Tight clothing around the abdomen may increase acid reflux. |
|
Limit late-night eating |
Give your body 2–3 hours to digest before lying down. |
|
Elevate your head while sleeping |
Using extra pillows or bed wedges can reduce nighttime acid movement. |
|
Manage stress with light activities |
Walking, yoga, and breathing techniques may improve gut function indirectly. |
|
Avoid tobacco or alcohol |
These can weaken the stomach lining and worsen acidity symptoms. |
Drug - Drug interaction
|
Medicine Group |
Examples |
Possible Interaction Notes |
|
Antifungals |
Ketoconazole, Itraconazole |
May reduce absorption, lowering effectiveness |
|
HIV Medicines |
Atazanavir |
Absorption can be affected due to higher stomach pH |
|
Blood Thinners |
Warfarin |
Ranitidine may affect INR levels (monitoring advised) |
|
Heart Rhythm Medicines |
Procainamide |
May increase levels and toxicity risk |
|
Antacids or Acid Reducers |
Other H2 blockers, PPIs |
Not usually recommended together (overlapping effects) |
|
Diabetes Medications |
Glipizide, Metformin |
Requires monitoring; possible changes in blood sugar control |
|
Iron Supplements |
Ferrous sulfate |
May reduce absorption due to pH changes |
|
Pain Relievers |
NSAIDs (e.g., Ibuprofen) |
Often taken together, but monitor for stomach protection advice |
|
B12 Supplements |
Cyanocobalamin |
Long-term use may reduce absorption of Vitamin B12 |
Synopsis
| Drug | : | Ranitidine |
| Pharmacological Category | : | H2 receptor antagonist |
| Therapeutic Indication | : | Peptic ulcers, reflux oesophagitis,Zollinger-Ellison Syndrome |
| Dosage Forms | : | Tablet, Capsule, Injection, Liquid, Oral solution, Syrup |
More Information
Do’s and Don’ts Around Rantac 150mg Tablet
Do’s: What to Keep in Mind
|
Action |
Why It Matters |
|
Take Rantac exactly as advised |
Follow the correct timing and duration to support its intended benefit. |
|
Take it before meals if advised |
This may help reduce acid-related discomfort depending on your condition. |
|
Space it apart from antacids or iron/calcium supplements |
Ranitidine may affect absorption of certain nutrients or medicines. |
|
Store in a cool, dry place |
Proper storage maintains tablet stability and effectiveness. |
|
Let your doctor know about all current medications |
Ranitidine may interact with certain antibiotics, antifungals, and blood thinners. |
|
Inform your doctor if pregnant or breastfeeding |
For safety consideration, even if no major harm is known from data. |
Don’ts: What to Avoid
|
Action |
Why It is Important |
|
Do not combine with similar acid reducers unless instructed |
May cause overlapping effects or reduce stomach acid too much. |
|
Do not take more than the recommended dose |
Overuse may affect vitamin absorption or lead to unintended effects. |
|
Do not crush or chew the tablet unless advised |
Swallowing whole ensures proper release and absorption. |
|
Avoid self-adjusting dose if symptoms change |
Always check with a healthcare provider before making changes. |
|
Do not take with alcohol or irritant foods (spicy, acidic) |
These may aggravate stomach lining sensitivity. |
|
Do not use expired tablets |
Outdated medicine may lose stability or safety. |
Comparison: Rantac 150mg Tablet vs Other Antacid Medicines.
|
Feature / Parameter |
Rantac 150mg (Ranitidine) |
Pantoprazole 40mg |
Omeprazole 20mg |
Digene Gel / Tablets |
Gelusil |
|
Type of Medicine |
H2 receptor blocker |
Proton pump inhibitor (PPI) |
Proton pump inhibitor (PPI) |
Antacid + Anti-flatulent (OTC) |
Antacid + Anti-gas |
|
Action Mechanism |
Reduces acid by blocking histamine-2 receptors in stomach lining |
Suppresses acid production at proton pump level |
Suppresses final acid secretion stage |
Neutralizes stomach acid |
Neutralizes acid + reduces bloating |
|
Onset of Action |
Moderate (within 1–2 hrs) |
Slow (may take 24 hrs) |
Slow (may take 24 hrs) |
Fast (within minutes) |
Fast (within minutes) |
|
Duration of Action |
8–12 hours |
24 hours or more |
Up to 24 hours |
2–3 hours approx |
2–4 hours |
|
Ideal Use Scenario |
Before meals or as advised for acid reduction |
Once-daily use for chronic acid issues |
Daily or on alternate days |
Quick relief from gas/indigestion |
Occasional relief for acidity/gas |
|
Prescription Required? |
Yes |
Yes |
Yes |
No (OTC) |
No (OTC) |
|
Suitable For Long-Term Use? |
Under supervision only |
Generally considered for short-term plans |
Short-term unless advised |
Short-term/occasional use |
Occasional use only |
|
Common Add-ons/Combinations |
Sometimes paired with antacids |
Often combined with domperidone |
May be paired with sucralfate |
No prescription combo |
No prescription combo |
|
Available Forms |
Tablets |
Tablets, injections |
Capsules |
Liquid, chewable tablets |
Chewable tablets |
|
Common Considerations |
May affect vitamin B12 absorption over long use |
Requires consistent timing |
May interact with antifungals |
May cause temporary bloating |
May affect people with sodium sensitivity |
What to Expect With Regular Use?
Many users find it supports comfort during indigestion-prone periods or helps maintain a balanced stomach environment over the day. However, individual experience may vary.
FAQs About RANTAC 150MG TABLET
Q: What is the use of Rantac 150 mg Tablet?
A: It is used in the management of stomach ulcers, duodenal ulcers, acidity, heart burn, acid reflux, indigestion, gas and inflammation of esophagus due to acid reflux (reflux oesophagitis).
Q: Can I take Rantac 150 mg Tablet for gas?
A: Yes. Rantac 150 mg Tablet could be used for relieving excess gas and indigestion. It works by reducing gastric acid secretion which reduces GI signs like acidity, heart burn, indigestion, gas, etc.
Q: Is Rantac 150 safe for daily use?
A: Take Rantac 150 mg Tablet as advised by your doctor. It is typically prescribed for not more than 2-12 weeks. Therefore, consult your doctor before using this medicine daily or for a long-term basis.
Q: Can I drink alcohol with Rantac 150 mg Tablet?
A: No, Do not drink alcohol while taking Rantac 150 mg Tablet, as it could increase the effects of alcohol.
Q: Can I take Rantac 150 Tablet on an empty stomach?
A: Rantac 150 Tablet can be taken with or without meals.
Q: Can I take Rantac 150 Tablet twice daily?
A: Rantac 150 Tablet is usually prescribed twice daily (morning and at bedtime) to achieve better results. However, your doctor is the right person to suggest a suitable frequency for taking Rantac Tablet.
Q: Is Rantac 150 Tab safe for long-term use?
A: Take Rantac 150 mg Tablet as advised by your doctor. It is typically prescribed for not more than 2-12 weeks. Therefore, consult your doctor before using this medicine daily or for a long-term basis.
Q: How long does it take for Rantac 150 mg Tablet to start working?
A: Rantac 150 Tablet starts working in 15 minutes of administration. Its efficacy can extend throughout the entire day or night, providing prolonged relief from symptoms.
Q: Does Rantac 150 Tablet have side effects?
A: Constipation and nausea are common side effects of taking Rantac 150 mg Tablet.
Q: Can Rantac 150 mg Tablet be used for acid reflux?
A: Yes. Rantac 150 mg Tablet lessens gastric acid secretion. This action stops problems caused by acid in the food pipe or too much acid in the stomach. Thus, relieves acid reflux or heartburn.
Q: Can I stop taking Rantac 150 mg Tablet on my own?
A: If you suddenly stop taking Rantac 150 mg Tablet the symptoms that existed before the management may return. It is always better to consult your physician before stopping the medicine, even if you feel better.
Q: Can I receive Rantac 150 mg Tablet before an operation?
A: Before undergoing any operation, inform your doctor if you are receiving Rantac 150 mg Tablet. This is because the doctor or surgeon can give you sedatives and anaesthetics to make you fall asleep before operation and it can interact with Rantac 150 mg Tablet. Consult your doctor for further queries.
Q: Can Rantac 150 mg Tablet be used in children?
A: Yes, Rantac 150 mg Tablet can be used in children aged 16 years or older. Children aged below 16 years of age must consult your doctor before taking this medicine.
Q:Is Rantac 150 mg Tablet safe during pregnancy?
A: There are no adequate and well-controlled studies regarding the use of Rantac 150 mg Tablet in pregnant women. Therefore, Rantac 150 mg Tablet should be used during pregnancy only if considered necessary by the physician.
References
1. KD Tripathi. Gastrointestinal Drugs. Essentials of Medical Pharmacology. Eighth Edition, 2019. Page – 698.
2. Morgan KA, Ahlawat R. Ranitidine. NIH: National Library of Medicine, National center of biotechnology Information. StatPearls [Internet]. December 2021. [Accessed on 22nd July 2025] 
3. Yeomans, N. D., Svedberg, L. E., & Naesdal, J. Is ranitidine therapy sufficient for healing peptic ulcers associated with non-steroidal anti-inflammatory drug use? NIH National Library of Medicine, National center for biotechnology information. Pubmed Central. November 2006. [Accessed on 22nd July 2025] 
4. Accord Healthcare Limited. Electronic Medicines Compendium (EMC). [Revised in August 2014] [Accessed on 22nd July 2025]
5. GlaxoSmithKline Bangladesh Limited. Zantac (Ranitidine hydrochloride). [Revised in February 2013] [Accessed on 22nd July 2025]
6. Apotex Pty Ltd. APO-Ranitidine (Ranitidine hydrochloride tablet). [Revised in March 2019] [Accessed on 22nd July 2025]
Useful Diagnostic Tests
- Urea breath test
- Upper GI endoscopy
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