
360 Block Gel
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Ranitidine (300mg)
Delivery across India. Free above ₹999; ₹49 from ₹499, ₹99 below. Chennai express delivery is chargeable.
Zynol 300 mg Tablet is used for management of Peptic ulcer disease Treatment of Gastroesophageal reflux disease (Acid reflux) Control Acidity.
Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated October 2026
Zynol 300 mg Tablet contains Ranitidine (300mg). It belongs to the Antacid / H2 blocker class of medicines.
Management of Peptic ulcer disease Treatment of Gastroesophageal reflux disease (Acid reflux) Control Acidity
Zynol 300mg Tablet works by blocking histamine H2 receptors on the acid-producing cells of the stomach. This reduces both basal and stimulated secretion of gastric acid, lowering the volume and acidity of stomach contents. By decreasing acid production, ranitidine helps relieve acid-related symptoms and allows irritated or ulcerated areas of the stomach and esophagus to heal.
Take this medicine in the dose and duration as advised by your doctor. Swallow it as a whole. Do not chew, crush or break it. Zynol 300mg Tablet may be taken with or without food.
Take it exactly as your doctor prescribed. Do not change the dose or stop early on your own.
If you miss a dose of Zynol 300mg Tablet, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular schedule.
An overdose of this medicine can cause severe loose motions or constipation and disturb the body's salt balance. Do not wait for symptoms to appear — go to the nearest emergency department and take the pack or strip with you.
Most side effects of Zynol are mild and settle as the body adjusts. Reported side effects include:
Stop the medicine and seek help immediately for a rash, swelling of the face or lips, wheezing or difficulty breathing. Tell your doctor about any side effect that persists or worries you.
| Pregnancy | Consult doctor |
|---|---|
| Breastfeeding | Breast feeding CONSULT YOUR DOCTOR |
| Alcohol | Use with caution |
| Driving | Driving CONSULT YOUR DOCTOR |
| Kidney | Kidney CAUTION |
| Liver | Liver CAUTION |
| Habit forming | No |
This is for short-term relief. See a doctor if you need it most days for more than a couple of weeks. Seek urgent care for chest pain that spreads to the arm or jaw, comes with sweating or breathlessness — do not assume it is acidity. Antacids interfere with the absorption of many other medicines. Take them at least two hours apart from anything else.
Not for anyone with a known allergy to this medicine or to any ingredient in the pack. Magnesium-containing antacids are avoided in significant kidney disease.
Reduces the absorption of thyroid tablets, iron, and several antibiotics — separate them by at least two hours.
Store at room temperature (below 25°C), protected from light and moisture. Keep out of reach of children.
If you are also taking other medications to treat acidity (e.g., antacid), take them 2 hours before or after taking Zynol 300mg Tablet. Avoid taking soft drinks, citrus fruits like orange and lemon, which can irritate the stomach and increase acid secretion. Inform your doctor if you do not feel better after taking Zynol 300mg Tablet for 2 weeks as you may be suffering from some other problems. Inform your doctor if you have ever been diagnosed with kidney disease, as the dose of your medicine may need to be adjusted. Do not stop taking the medication without talking to your doctor.
Medicines with the same active ingredient (Ranitidine (300mg)). Ask your doctor or pharmacist before switching brands.
| Medicine | Pack | Price | vs Zynol 300 mg Tablet |
|---|---|---|---|
| Monorin 300 mg Tablet | 10 | ₹18 | 61% more |
| Zindac 300 mg Tablet | 1X10 | ₹20 | 76% more |
| Aciloc 300 TabletCADILA PHARMA | tablet · 20`S | ₹59 | 421% more |
| Rantac OD 300JB CHEMICALS | controlled-delivery tablet · 10`S | ₹78 | 592% more |

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The information on Zynol 300 mg Tablet is compiled from the manufacturer's prescribing information and the sources below, and is reviewed by a registered medical practitioner. It does not replace advice from your own doctor.