⚕️ Full Prescribing Information
For complete safety information, warnings, and dosage guidelines:
View FDA Label (PDF) →📋 Overview
Viagra (sildenafil) is an oral medication used to treat erectile dysfunction by increasing blood flow to the penis during sexual stimulation.
How It Works
Viagra works by inhibiting PDE5, an enzyme that restricts blood flow. This allows increased blood flow to the penis when sexually stimulated, helping achieve and maintain an erection.
✓ FDA Approved Uses
- Treatment of erectile dysfunction (ED)
- Improve ability to achieve and maintain erection
🧪 Required Lab Monitoring
Your healthcare provider will order these tests to monitor your treatment:
Baseline cardiovascular risk assessment
If symptoms of low testosterone present
Need to book these tests?
Order Tests Online →⚡ Common Side Effects
Contact your doctor if these persist or worsen:
- Headache
- Flushing
- Indigestion
- Nasal congestion
- Dizziness
- Visual disturbances
🚨 Serious Side Effects
Seek immediate medical attention if you experience:
- Sudden vision loss
- Sudden hearing loss
- Priapism (erection lasting more than 4 hours)
- Severe hypotension
⚠️ Do Not Use If
- Taking nitrates for chest pain
- Taking riociguat for pulmonary hypertension
- Severe cardiovascular disease
- Retinitis pigmentosa
📢 Important Warnings
- Do not use with nitrate medications
- Seek immediate medical attention for erections lasting more than 4 hours
- May cause sudden vision or hearing loss