Synflex Tablet Side Effects in Pakistan

Synflex Tablet side effects — a complete guide. From common effects to serious warnings — everything you need to know is on this page.

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: 2026-03-23

Side Effects

Quick Answer

Common side effects of Synflex Tablet include stomach disturbances and heartburn. Serious effects such as breathing issue require immediate medical attention. Most patients tolerate Synflex Tablet well at the correct dose. Contact your doctor if any side effect persists or worsens.

Side Effects at a Glance

Common

Stomach disturbances
Heartburn
Dizziness

Serious — See a Doctor

Breathing issue
Fainting
Severe swelling

When to See a Doctor Immediately

Severe stomach pain or bleeding
Persistent nausea and vomiting
Difficulty breathing or chest pain

Synflex Tablet Side Effects (Nuksanat)

Synflex Tablet (Naproxen Sodium) is generally safe when taken at the correct dose. However, like all medicines, it can cause side effects in some patients.

Common Side Effects (Aam Nuksanat)

Stomach disturbances
Heartburn
Dizziness

These side effects are usually mild. If they continue, inform your doctor.

Serious Side Effects (Sanjeedah Nuksanat)

Breathing issue — see a doctor immediately
Fainting — see a doctor immediately
Severe swelling — see a doctor immediately

When to See a Doctor (Kab Doctor Se Milna Zaroori Hai)

Severe stomach pain or bleeding
Persistent nausea and vomiting
Difficulty breathing or chest pain

Warnings and Precautions (Ihtiyat)

Patients with stomach ulcers, severe liver dysfunction, or kidney disease should not use Synflex tablets.
Not recommended for long-term therapy

Side Effects Summary Table

Type	Side Effect	Action
Common	Stomach disturbances	Monitor / inform doctor
Common	Heartburn	Monitor / inform doctor
Common	Dizziness	Monitor / inform doctor
Serious	Breathing issue	See a doctor immediately
Serious	Fainting	See a doctor immediately

Reporting Side Effects

If you notice any unexpected side effect, report it on the DRAP pharmacovigilance portal: https://www.dra.gov.pk/pharmacovigilance

The information in this guide is for educational purposes only. If you notice any side effect, contact your doctor or pharmacist.

Frequently Asked Questions

What are the most common side effects of Synflex Tablet?

The most commonly reported side effects of Synflex Tablet include stomach disturbances and heartburn. These are usually mild and go away on their own. Inform your doctor if they persist.

Can Synflex Tablet cause allergic reactions?

Yes, like all medicines, Synflex Tablet can cause allergic reactions in some people. Signs include rash, itching, swelling, or difficulty breathing. Stop use and seek medical help immediately if this happens.

Is Synflex Tablet safe to take for a long time?

Long-term safety depends on the condition and the patient. Your doctor will monitor for any signs of breathing issue if continued use is needed.

What should I do if I experience side effects from Synflex Tablet?

For mild side effects, inform your pharmacist. For serious effects such as breathing issue, stop the medicine and contact your doctor immediately or go to the nearest hospital.

Does Synflex Tablet affect the liver or kidneys?

Synflex Tablet may require dose adjustment in patients with liver or kidney impairment. Your doctor will advise based on your test results and overall health condition.

Brand alternatives, same-class options, and other medicines used for the same conditions as Synflex Tablet.

Brand alternatives

Other Naproxen Sodium brands available in Pakistan.

All brands →

Other nsaids (anti-inflammatory painkillers)

Sibling medicines in the NSAIDs (Anti-Inflammatory Painkillers) class.

All in class →

Used for the same conditions

Other medicines commonly used for stomach pain (abdominal pain) and overlapping conditions.

Stomach Pain (Abdominal Pain) hub →

Sources

DRAP Registered Products Database — Drug Regulatory Authority of Pakistan
WHO Model List of Essential Medicines, 23rd ed. (2023) — World Health Organization
British National Formulary (BNF) — BMJ Group & Pharmaceutical Press

Medical disclaimer

This page is for educational use only and does not replace professional medical advice. Always confirm diagnosis, dose, and interactions with a qualified doctor or pharmacist before starting or changing any medicine.