Do I need a prescription to buy Synflex 550mg Tablet?

No. Synflex 550mg 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 Synflex 550mg Tablet contain?

Synflex 550mg Tablet is a tablet containing Naproxen sodium 550mg. The full ingredient list is shown in the Composition or Ingredients section on this page and on the product packaging.

What pack sizes does Synflex 550mg 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 Synflex 550mg 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 Synflex 550mg Tablet?

Use it exactly as stated on the pack label, without changing the amount or how often you use it. If anything on the label is unclear, check with a pharmacist before the first use, and read the Directions for Use section on this page.

Can I speak to a doctor or pharmacist about Synflex 550mg 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 Synflex 550mg 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 Synflex 550mg 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 Synflex 550mg 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.

Synflex 550mg Tablet | naproxen sodium | pain inflammation NSAID tablet | DoctorOnCall Malaysia

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Synflex 550mg Tablet

Brand DKSH

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FDA Approved
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Save: RM6.10 25% OFF

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

Written byDr. Chong Zhan PongDoctor of Medicine (MD), International Medical University (IMU)

Last updated: October 16, 2026

Overview

Synflex 550mg Tablet contains Naproxen sodium 550mg and is presented as a tablet. It is supplied in a pack size of 10s.

It is classified as a non-prescription medicine, so no prescription is needed to order it. Under Malaysian rules for medicine information, this page carries product, safety and handling information only.

You can consult a doctor or pharmacist online on DoctorOnCall about this product before or after you order. Every order is checked by a registered pharmacist before it is delivered. Always read the label and the leaflet supplied with the pack.

Directions for Use

Take Synflex 550mg Tablet exactly as prescribed by your doctor, swallowing the tablet whole with a full glass of water, preferably with food or milk to reduce the chance of stomach upset. Do not crush or chew the tablet, and avoid lying down for at least 15 to 30 minutes after taking it to reduce irritation to the food pipe.

Dosage

The usual adult dose is one Synflex 550mg Tablet taken once or twice daily, depending on the condition being treated, but your doctor will determine the exact dose, frequency, and duration of treatment based on your diagnosis and risk factors. Do not increase your dose or take it more often than prescribed, and use the lowest effective dose for the shortest time needed to control your symptoms.

Storage Instructions

Store below 30°C in a cool, dry place away from direct sunlight and moisture, in the original packaging. Keep out of reach and sight of children, and do not store in the bathroom.

Side Effects

Upset stomach or heartburn
Headache or dizziness
Nausea or vomiting
Drowsiness or tiredness
Constipation or diarrhea
Mild skin rash

Contraindications

Active or history of stomach or duodenal ulcer, or gastrointestinal bleeding
Severe kidney or liver impairment
Severe or uncontrolled heart failure
Known hypersensitivity to naproxen, aspirin, or other NSAIDs, including a history of asthma or severe allergic reaction triggered by these medicines
Third trimester of pregnancy
Recent coronary artery bypass graft (CABG) surgery

Drug / Food Interactions

Other NSAIDs or aspirin — combining increases the risk of stomach ulcers and bleeding
Warfarin and other blood-thinning medicines — increased bleeding risk
ACE inhibitors, angiotensin receptor blockers (ARBs), and diuretics — naproxen may reduce their effectiveness and increase risk to the kidneys
Corticosteroids and SSRIs — combined use raises the risk of gastrointestinal bleeding
Lithium and methotrexate — naproxen can raise blood levels of these medicines, increasing toxicity risk
Alcohol — may increase the risk of stomach irritation and bleeding

Quick Tips

Take Synflex with food to reduce the chance of stomach irritation
Do not combine with other NSAIDs or aspirin unless specifically advised by your doctor
Report black or bloody stools, severe stomach pain, or vomiting blood to a doctor immediately
Use the lowest effective dose for the shortest duration needed
Tell your doctor about any heart, kidney, or liver conditions before starting treatment

Ingredients / Active Ingredients

Naproxen Sodium

Naproxen sodium 550mg
Standard tablet excipients as listed on the product packaging

Safety Advice

Pregnancy

Not Safe

This medicine is not considered safe during pregnancy and should be avoided.

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

Not Advisable

It is not advisable to consume alcohol while taking this medicine.

Driving

Use With Care

Use caution while driving until you know how this medicine affects you.

Relevant Information

Long-term or high-dose use of NSAIDs like naproxen carries a higher risk of stomach ulcers, kidney problems, and cardiovascular events such as heart attack or stroke, so your doctor may periodically review whether you still need Synflex 550mg Tablet and at what dose. If you have risk factors such as a history of ulcers, are elderly, or take other medicines that affect the stomach or kidneys, your doctor may prescribe a stomach-protecting medicine alongside Synflex or suggest a lower dose.

Frequently Asked Questions

Product Specifications

Brand	DKSH
Classification	Non-prescription
Ingredients / Active Ingredients	Naproxen Sodium
Pack Size	10s
Shelf Life	Synflex 550mg Tablet should be used within the shelf life indicated on the packaging when stored correctly and unopened; always check the expiry date before use and do not take tablets that have expired.