Sildenafil
Viagra, Revatio, Kamagra, Sildenafil citrate, Vizarsin, Silagra
Forms: Tablets for erectile dysfunction (Viagra) and for pulmonary arterial hypertension (Revatio); many generics.
Short-acting PDE5 inhibitor that improves erections with sexual arousal and treats pulmonary arterial hypertension. Prescription drug, only under a doctor's supervision; never with nitrates or 'poppers'.
Legal status: Prescription medicine in most countries (rules vary by country); not on the WADA Prohibited List.
What it gives
What people use it for and what the sources report. Strength is a general category from the literature: mild, clear or strong.
Purpose
In a gym survey, steroid users took erectile-dysfunction drugs more often than other members; men who stopped steroids within the past year reported worse sexual function than non-users. Some athletes hope it boosts performance. Medical use: erectile dysfunction, pulmonary arterial hypertension.
What people seek and what studies show
Used for erections. In 21 placebo-controlled trials in over 3,000 men with erectile dysfunction of many causes, it improved erections; about 66% of attempts at intercourse succeeded versus about 20% on placebo. It works only with sexual arousal and did not change how often men attempted sex. In healthy people it did not improve exercise at sea level, and altitude studies disagree.
Effects
Evidence: Approved medicine — studied in people for its medical use
Possible side effects
Possible does not mean certain: whether they appear depends on dose, duration, individual response and monitoring. Below — what to watch for and how to notice it early.
4 possible side effects
level · how often it is reportedWhat the levels mean
Level: general category from the literature, not your personal risk
How often
- common
- reported often
- possible
- reported in some people
- rare
- reported occasionally
How to lower the risks
For 3 of 4 possible side effects there are specific ways to lower the chance: everyday measures, supplements and options a doctor may consider. For the rest — general advice. No measure removes a risk completely.
Stop and see an ophthalmologist at any vision change.
How each option helps (1)
- Working with a doctor — Vision changes on clomiphene, tamoxifen, isotretinoin, PDE5 or GLP-1 drugs need prompt review; several labels advise stopping, which may limit lasting harm.
Products obtained without a prescription are often fake, mislabeled or non-sterile, and there is no way to check at home. For legal supplements, look for third-party testing (Informed Sport, NSF).
Low-level side effects
How each option helps (2)
- Working with a doctor — Finds the cause of joint or muscle pain — estradiol pushed too low by an aromatase inhibitor, GH-driven swelling, statin muscle effects — so treatment can be adjusted.
- Coenzyme Q10 — May ease statin-related muscle aches (one meta-analysis positive, results mixed); no help for joint pain from low estrogen.
How each option helps (2)
- Working with a doctor — Assesses persistent vomiting or severe belly pain (possible pancreatitis or gallstones) and adjusts prescribed GLP-1 treatment when nausea persists.
- Pancreatin + dimeticone (Pankreoflat) — May ease heaviness and gas after meals; can cause nausea or diarrhea. Not for pork or cow's milk protein allergy (anaphylaxis reported) or early acute pancreatitis.
Check-ups and blood tests
Which tests and check-ups to do and when. This is a guide — agree the exact schedule with your doctor.
Which doctors can help
Get medical help at once if
- Sudden loss or blurring of vision, flashes, a curtain over sight — seek urgent care.
In an emergency, call your local emergency number.
For women
Not approved for sexual problems in women; the pulmonary-hypertension form is used in both sexes. Human data in pregnancy and breastfeeding are limited — decide with a doctor.
Myth & fact
“Viagra boosts gym performance by sending more blood to the muscles.”
In controlled studies it did not improve exercise in healthy people at sea level. A small trial at simulated high altitude, where it lowers blood pressure in the lungs, found no gain either, though some earlier altitude studies did.
Combinations
Sildenafil lowers blood pressure a little, and so do these drugs; the effects add up. With dehydration, heat or alcohol this can mean dizziness or fainting, especially when standing up quickly.
Melanotan II and PT-141 can trigger erections on their own, and priapism is reported with melanotan; with sildenafil the effects add up. An erection lasting over four hours is an emergency that can cause permanent damage.
Melanotan IIBremelanotideSources
Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.
Open the stack check