Do I need a prescription to buy Primes Cimetidine 400mg Tablet?

No. Primes Cimetidine 400mg Tablet is a non-prescription product and can be ordered without a prescription. It is still dispensed by a registered pharmacist on DoctorOnCall.

What does Primes Cimetidine 400mg Tablet contain?

Primes Cimetidine 400mg Tablet is a tablet containing Cimetidine 400mg. The full ingredient list is shown in the Composition or Ingredients section on this page and on the product packaging.

What pack sizes does Primes Cimetidine 400mg Tablet come in?

It is supplied in a pack size of 10s. Choose the pack size you need from the options shown on this page before adding the item to your cart.

Why is there no information here about what Primes Cimetidine 400mg Tablet is for?

This page is limited to product, safety and handling information in line with Malaysian rules on medicine information. If you want advice on whether this product suits you, book an online consultation with a doctor or pharmacist on DoctorOnCall.

How should I use Primes Cimetidine 400mg Tablet?

Follow the instructions printed on the label and in the leaflet supplied with the pack, and do not exceed the stated amount or duration. Handling steps are set out in the Directions for Use section on this page.

Can I speak to a doctor or pharmacist about Primes Cimetidine 400mg Tablet before I buy it?

Yes. DoctorOnCall offers online consultations with licensed doctors and registered pharmacists, so you can ask about this product, your existing medicines, or anything on the label before you place an order.

What should I do if I notice side effects after using Primes Cimetidine 400mg Tablet?

Stop using the product and speak to a doctor or pharmacist about any reaction that concerns you. Seek medical care immediately for signs of a severe reaction such as difficulty breathing, swelling of the face, lips or throat, or a widespread rash. Reported reactions are listed in the Side Effects section on this page.

How long will delivery take?

Within Malaysia, standard delivery takes 3 to 5 working days. Same-day delivery is available in the Klang Valley for orders placed before 12pm; orders placed after 12pm arrive by the end of the next day. Orders to Singapore are sent as international deliveries and take 5 to 9 working days. A lump-sum shipping and handling fee applies to every overseas delivery and is shown at checkout.

What payment methods can I use?

Customers in Malaysia can pay by FPX online banking, credit or debit card (Visa and Mastercard), and supported e-wallets including Touch ‘n Go eWallet, GrabPay and ShopeePay. FPX and local e-wallets are tied to Malaysian bank and wallet accounts, so if your delivery address is in Singapore, use the payment options displayed at checkout for that address rather than assuming the same list applies.

Can Primes Cimetidine 400mg Tablet be delivered to Singapore?

Yes. DoctorOnCall ships to Singapore as an international order dispatched from Malaysia, arriving in 5 to 9 working days with a lump-sum shipping and handling fee. Singapore’s Health Sciences Authority (HSA) allows personal imports of up to three months’ supply of a medicine for your own use or an immediate family member’s, as long as it contains no controlled drugs, psychotropic substances or prohibited items. Keep the product in its original labelled packaging and keep a copy of your prescription or doctor’s letter with it. Quantities above three months’ supply, and medicines containing controlled substances, require prior HSA approval.

Is Primes Cimetidine 400mg Tablet registered with the authorities?

Products listed on DoctorOnCall are registered with Malaysia’s Ministry of Health for supply in Malaysia, and each pack carries its MAL registration number. An order delivered to Singapore arrives as a personal import of a Malaysia-registered product; HSA product registration is not required for personal-use quantities, but it is also not the same as a product registered for sale in Singapore. If you need a locally registered Singapore product, buy it from a pharmacy in Singapore.

Who do I contact if there is a problem with my order?

DoctorOnCall’s customer care team handles order, delivery and product queries through the contact channels on the site, including WhatsApp and the online help centre. For deliveries to Singapore, allow more time before chasing an order than you would for a local Malaysian delivery, as the parcel passes through customs clearance and tracking updates can appear later in the journey.

Primes Cimetidine 400mg H2 Blocker Tablet - Acid Reflux & Ulcer Malaysia

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Primes Cimetidine 400mg Tablet

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Reviewed byDr. Mohd Izzat Amir Bin AwangDoctor of Medicine (MD), University of Mansoura - Manchester

Written byDr. Adeline Carol PetersBachelor of Medicine and Bachelor of Surgery (MBBS) — Manipal Academy of Higher Education (MAHE)

Last updated: October 18, 2026

Overview

Primes Cimetidine 400mg Tablet is supplied as a tablet, with Cimetidine 400mg. It is supplied in a pack size of 10s.

No prescription is required for this product, as it is a non-prescription medicine. This page is limited to product, safety and handling information.

If you would like guidance before buying, you can speak to a doctor or pharmacist through an online consultation on DoctorOnCall. Orders are dispensed by a registered pharmacist and delivered to your address.

Directions for Use

Swallow the tablet whole with a glass of water. Cimetidine 400mg can be taken with or shortly before meals, or as a single dose at bedtime, depending on the pattern of your symptoms. Follow the dosing instructions on the product label or as advised by your pharmacist, and do not exceed the recommended daily amount.

Dosage

The typical adult dose for symptom relief is one 400mg tablet twice daily, or a single 400mg tablet at bedtime for milder, occasional symptoms, for a period of up to two weeks unless a doctor advises otherwise. If heartburn or indigestion symptoms have not improved within two weeks of regular use, stop and see a doctor. This product is not recommended for children without medical advice.

Shelf Life

Primes Cimetidine 400mg Tablet is typically stable for up to 36 months from the date of manufacture when stored correctly and unopened. Always check the expiry date printed on the blister strip or carton before use, and do not use the tablets beyond this date.

Storage Instructions

Store below 30°C in a cool, dry place away from direct sunlight and moisture. Keep the tablets in their original packaging until ready to use, and keep out of the reach and sight of children.

Side Effects

Headache
Dizziness
Diarrhea or constipation
Fatigue
Muscle or joint pain
Skin rash or itching
Breast tenderness or enlargement (rare)
Confusion, especially in older adults

Contraindications

Known hypersensitivity or allergy to cimetidine or any other ingredient in the tablet
Use with caution in patients with significant kidney impairment, as dose adjustment may be needed
Not recommended for children under 12 years without medical advice
Pregnant or breastfeeding women should consult a doctor or pharmacist before use
Not intended for long-term or continuous use without medical supervision

Drug / Food Interactions

Cimetidine can increase blood levels of warfarin, raising the risk of bleeding — patients on warfarin should seek medical advice before use
May increase blood levels of phenytoin and other anti-epileptic medicines
Can affect the clearance of theophylline, benzodiazepines (e.g. diazepam), beta-blockers, and some calcium channel blockers, increasing their effects
Antacids may reduce cimetidine absorption if taken at the same time — space doses apart where possible
Smoking may reduce the effectiveness of cimetidine in healing stomach irritation
Always inform your pharmacist of all other medicines you are taking, as cimetidine has a higher interaction potential than newer H2 blockers

Quick Tips

Take at the first sign of heartburn or indigestion for best relief
Avoid trigger foods such as spicy, fatty, or acidic foods, caffeine, and carbonated drinks while symptomatic
Avoid or limit alcohol, which can worsen acid reflux
Do not use continuously for more than 2 weeks without consulting a doctor
Tell your pharmacist about all other medicines you take before starting this product
Eating smaller, more frequent meals and avoiding lying down soon after eating can help reduce symptoms

Ingredients / Active Ingredients

Cimetidine

Active ingredient: Cimetidine 400mg
Other ingredients (excipients) as listed on the product packaging

Safety Advice

Pregnancy

Use With Care

This medicine should be used cautiously during pregnancy. Monitoring may be required.

Breastfeeding

Use With Care

Use with caution. Monitor infant for potential adverse reactions.

Kidney

Use With Care

Use cautiously. Dose adjustment or monitoring may be required.

Liver

Use With Care

Use cautiously. Liver function monitoring may be required.

Alcohol

Use With Care

Caution is advised when consuming alcohol with this medicine.

Driving

Not Advisable

It is not advisable to drive if you experience side effects from this medicine.

Relevant Information

Cimetidine is one of the older H2-receptor antagonists and, while effective, has a greater tendency to interact with other medicines compared with newer options such as famotidine. Seek prompt medical attention if you experience difficulty swallowing, unintentional weight loss, persistent vomiting, vomiting of blood, or black/tarry stools, as these may indicate a more serious underlying condition that needs proper investigation rather than self-treatment.