Sildenafil (Viagra, Kamagra)
The original. Onset ~30–60 min, effect window ~4 h. Available in many brands and forms.
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Alternatives to Kamagra
Kamagra gets the headlines, but it is one brand among dozens — and one of four PDE5 inhibitors on the market. If Kamagra isn't right for your situation or your country, here is the wider landscape.
Four molecules, many brands
Erectile-dysfunction medicines all belong to one family — PDE5 inhibitors — but they differ in how long they last and how quickly they act. Sildenafil is the original and the shortest-acting; tadalafil lasts the longest; vardenafil is close to sildenafil; avanafil is the fastest to act.
Within sildenafil alone there are many brands: Viagra (the original), generic sildenafil from licensed manufacturers, and the Indian brands that include Kamagra, Silagra, Caverta, Eriacta, Filagra, and Malegra. Licensed generic sildenafil is the safest place to start in markets where it is available.
The four PDE5 inhibitors
The key difference is time.
Tadalafil (Cialis)
The long one. Effect window up to ~36 h, so it suits spontaneous rather than planned sex.
Vardenafil (Levitra)
Close cousin of sildenafil, ~4–5 h window, with a similar profile.
Avanafil (Spedra)
The fast one. Onset in as little as 15 min in some users, ~6 h window.
How the four compare
| Sildenafil | Tadalafil | Vardenafil | Avanafil | |
|---|---|---|---|---|
| Typical onset | 30–60 min | 30–45 min | 30–60 min | 15–30 min |
| Effect window | ~4 h | Up to ~36 h | ~4–5 h | ~6 h |
| Daily-dose option | No | Yes (2.5–5 mg) | No | No |
| Food interference | Heavy meals delay it | Minimal | Heavy meals delay it | Minimal |
Other sildenafil brands to know
These share sildenafil's active ingredient and differ mainly in manufacturer, form, and market.
Viagra
The Pfizer original — the reference product every generic is measured against.
Generic sildenafil
Licensed, usually cheapest, and available from regulated pharmacies where approved.
Silagra / Caverta
Indian sildenafil tablets from other established manufacturers (Cipla, Ranbaxy).
Filagra / Malegra
Further Indian brands, some with jelly and soft variants similar to Kamagra.
Cenforce & Fildena lines
The multi-strength sildenafil families from Centurion and Fortune — covered on their own page.
Ajanta's other molecules
The manufacturer behind Kamagra also markets tadalafil and vardenafil lines.
Marketed as a 20 mg tadalafil tablet built around the ingredient's longer opportunity window.
Marketed as tadalafil 20 mg plus dapoxetine 60 mg; the fixed-dose combination raises additional evidence and safety questions.
A no-water tadalafil sachet; jelly-specific faster-absorption claims need formulation evidence.
Marketed as a 20 mg vardenafil tablet; exact onset varies and requires product verification.
Compare the full line
See how every Ajanta form — sildenafil, tadalafil, and vardenafil — stacks up side by side.