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Sildenafil (Viagra) Side Effects in Pakistan

This guide covers Sildenafil Tablet (Sildenafil) for this formulation. Confirm the exact local label and individual prescription.

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: · Review date on file:

A named review is not recorded for this page. Confirm medicine advice with your doctor or pharmacist.

The latest editorial changes have not received a new named clinical review.

Side Effects

Quick Answer

Reported effects of Sildenafil Tablet include Headache (most common); Flushing (redness of face). Severe hypotension (with nitrates — can be fatal — EMERGENCY); Priapism (painful erection lasting >4 hours — EMERGENCY — permanent damage if not treated promptly) require medical assessment. Lists do not establish how frequently an effect occurs.

Side Effects at a Glance

Reported effects

  • Headache (most common)
  • Flushing (redness of face)
  • Dyspepsia (indigestion)
  • Nasal congestion
  • Visual colour tinge (bluish/blueish-green hue)
  • Dizziness

Reactions needing medical advice

  • Severe hypotension (with nitrates — can be fatal — EMERGENCY)
  • Priapism (painful erection lasting >4 hours — EMERGENCY — permanent damage if not treated promptly)
  • NAION (non-arteritic anterior ischaemic optic neuropathy — sudden vision loss — EMERGENCY)
  • Sudden hearing loss or severe tinnitus (EMERGENCY)

When to See a Doctor Immediately

  • Severe hypotension (with nitrates — can be fatal — EMERGENCY)
  • Priapism (painful erection lasting >4 hours — EMERGENCY — permanent damage if not treated promptly)
  • NAION (non-arteritic anterior ischaemic optic neuropathy — sudden vision loss — EMERGENCY)
  • Sudden hearing loss or severe tinnitus (EMERGENCY)

Sildenafil Tablet side effects

Reported Effects (Nuksanat)

  • Headache (most common)
  • Flushing (redness of face)
  • Dyspepsia (indigestion)
  • Nasal congestion
  • Visual colour tinge (bluish/blueish-green hue)
  • Dizziness

Serious Effects and Warning Symptoms (Ahm alamat)

  • Severe hypotension (with nitrates — can be fatal — EMERGENCY)
  • Priapism (painful erection lasting >4 hours — EMERGENCY — permanent damage if not treated promptly)
  • NAION (non-arteritic anterior ischaemic optic neuropathy — sudden vision loss — EMERGENCY)
  • Sudden hearing loss or severe tinnitus (EMERGENCY)

A list does not determine frequency or prove causation. Seek medical advice for persistent, worsening or unexpected symptoms.

Interactions (Dawaon ke sath reaction)

Nitrates (GTN, isosorbide — ABSOLUTE CONTRAINDICATION — fatal hypotension); Alpha-blockers (orthostatic hypotension — use with caution); Ritonavir / HIV protease inhibitors (increase sildenafil levels significantly — dose reduction required); Antifungals (itraconazole, ketoconazole — increase sildenafil levels)

Before Changing Treatment (Ilaj badalne se pehle)

  • ABSOLUTE CONTRAINDICATION with nitrates (GTN, isosorbide mononitrate/dinitrate) — can cause fatal hypotension
  • Caution with alpha-blockers — orthostatic hypotension risk
  • Cardiovascular risk — patients with active cardiac disease, recent MI/stroke: consult cardiologist first
  • COUNTERFEIT WARNING: Many fake Sildenafil/Viagra tablets sold in Pakistan — only buy from licensed pharmacies with valid prescription
  • Vision changes: stop immediately and seek care if sudden vision loss (NAION)
  • Hearing loss: stop immediately if sudden hearing loss or tinnitus

Related Information (Mazeed maloomat)

Full Sildenafil Tablet guide · Uses · Dosage · Side effects

Educational information only. This editorial correction does not constitute a new clinician review. Confirm the local product leaflet and prescription with a qualified healthcare professional.

Frequently Asked Questions

Sildenafil Tablet kis kaam aati hai?

Sildenafil Tablet contains Sildenafil. Erectile Dysfunction (ED — mardana kamzori); Pulmonary Arterial Hypertension (PAH — specialist indication, different dosing). The diagnosis and exact product determine suitability.

Dose kaise confirm karein?

The Sildenafil dose and duration must be selected for the diagnosed condition, exact formulation and kidney or liver function. This page does not establish a single starting or maximum dose for every patient.

Bachon ke liye dose kya hai?

NOT for use in children — PAH dosing in children is strictly specialist-only

Pakistan mein price kitni hai?

A current price matched to the local strength and pack size has not been verified. Confirm the printed price, pack and expiry with a licensed pharmacy.

Nuksanat hon to kya karein?

Reported effects include Headache (most common); Flushing (redness of face); Dyspepsia (indigestion). Seek medical help for Severe hypotension (with nitrates — can be fatal — EMERGENCY); Priapism (painful erection lasting >4 hours — EMERGENCY — permanent damage if not treated promptly). A symptom list does not predict how often an effect occurs.

Related medicines

Explore entries related to Sildenafil Tablet by ingredient, class and listed uses. These links are not recommendations to switch treatment.

Related by listed uses

Entries with overlapping headache tags; they may address different diagnoses.

Headache hub →

Sources

  1. Sildenafil viagra — NHS
  2. DRAP Registered Product Data (Public Registry) — Drug Regulatory Authority of Pakistan
  3. WHO Model List of Essential Medicines, 23rd ed. (2023) — World Health Organization
  4. 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.