Sildenafil (Viagra)
Street names: Viagra, Kamagra, Cenforce, Fildena, Vega
⚡What it does
- Erection support on arousal (PDE5 inhibition, 30–60 min onset)
- Lasts ~4–5 hours
- Also legitimately treats pulmonary hypertension (Revatio)
⚠Key risks
- THE most counterfeited drug class in the world — fake sildenafil is a leading fentanyl-pill channel in some regions
- Dangerous blood-pressure drop with nitrates (heart meds) — potentially fatal combo
- Counterfeit pills: variable or zero active ingredient, contamination
- Vision/color changes, priapism (4+ hr erection = medical emergency)
✚Overdose signs
- Prolonged erection >4 hours — emergency
- Severe dizziness, fainting (blood pressure drop)
- Vision or hearing loss — rare, urgent
Category comparison — Sexual Health & ED Meds
| Substance | Class | Top risks | Street price |
|---|---|---|---|
| Sildenafil (Viagra) | Rx-only — not a controlled drug | THE most counterfeited drug class in the world — fake sildenafil is a leading fentanyl-pill channel in some regions; Dangerous blood-pressure drop with nitrates (heart meds) — potentially fatal combo | ~$1–$15 per tablet |
| Tadalafil (Cialis) | Rx-only — not controlled | Counterfeit ED pills are a major fentanyl/adulterant channel in some regions; Dangerous blood pressure drop with nitrates | ~$2–$15 per tablet |
| Vardenafil (Levitra) | Rx-only — not controlled | Same nitrate danger as all PDE5 inhibitors (fatal BP drop); Counterfeit Levitra extremely common | ~$1–$12 per tablet grey-market vs pharmacy |
| Dapoxetine & combo pills | Rx-only | Serotonin syndrome risk — especially with real antidepressants, MDMA, or other serotonergic drugs; Syncope (fainting) — the labeled warning; take with water, standing up slowly | ~$1–$4 per combo tablet grey-market |
| Gas-Station Sex Pills ('Rhino' & Knockoffs) | Sold as 'supplements' — FDA warns they are adulterated drugs | FDA has issued hundreds of warnings: hidden drug doses can crash blood pressure, especially with nitrates or heart meds; Analogs are untested — some cause days-long painful erections (priapism = emergency) | ~$5–$15 per pill/pack |
| Tadalafil (Cialis) | Rx-only | #1 counterfeit-drug target alongside sildenafil — fake Cialis regularly contains unlisted sildenafil or nothing; DANGEROUS with nitrates (nitroglycerin, poppers): severe blood-pressure collapse | ~$10–20/pill grey-market generic |
RxBrand names on the grey market
These brands are sold as this compound. Same molecule, different label and supply chain — quality varies enormously between them.
?Frequently asked questions
What does Sildenafil (Viagra) look like?
Blue diamond 25/50/100 mg tablets (Viagra); every color/shape from grey-market brands; oral jellies in sachets
What are the signs of a Sildenafil (Viagra) overdose?
Prolonged erection >4 hours — emergency; Severe dizziness, fainting (blood pressure drop); Vision or hearing loss — rare, urgent Call emergency services immediately.
How addictive is it?
THE most counterfeited drug class in the world — fake sildenafil is a leading fentanyl-pill channel in some regions Dependence can develop with regular use.
🔗Sources & further reading
Facts on this page are compiled from these primary sources. External links open in a new tab.