Um médico licenciado na UE analisa o seu caso e, se for elegível, emite uma receita eletrónica válida em qualquer farmácia da UE ao abrigo da Diretiva 2011/24/UE.
A medicação, se for prescrita, é dispensada e paga separadamente numa farmácia.
Sobre o tratamento
Substância ativa: Sildenafil · Dosagens: 25 / 50 / 100 mg on demand
Sildenafil is a phosphodiesterase-5 (PDE5) inhibitor. It relaxes smooth muscle in the penile blood vessels, facilitating an erection in response to sexual stimulation — it does not cause spontaneous erections or change desire.
It's taken on demand, 30 to 60 minutes before sexual activity; high-fat meals can delay onset. The doctor prescribes the appropriate dose after reviewing your cardiovascular health, current medication and contraindications.
Como ajuda
Taken 30–60 minutes before sex — no daily routine required.
25, 50 or 100 mg — the doctor prescribes what fits your case and tolerance.
Cardiovascular health and interactions are reviewed before any prescription.
O que esperar
On demand, before sexual activity. The doctor sets your dose and reviews it with you if the response or tolerance isn't right.
Doses your doctor can prescribe
Segurança primeiro
Viagra é um medicamento eficaz — e, como qualquer medicamento, acarreta riscos. O seu médico verifica tudo isto antes de prescrever. Este é o retrato honesto, não apenas palavras tranquilizadoras.
Prescrito para homens adultos com disfunção erétil. Tomado cerca de 30–60 minutos antes da atividade sexual.
Quem não deve tomar
PREÇOS
Um preço. Sem surpresas.
25 € por consulta médica online. Se o médico não aprovar o tratamento, reembolsamos o valor total em 48 horas.
CONSULTA ÚNICA
Mais popularUma consulta, um médico, uma decisão.
Iniciar consultaO QUE ESTÁ INCLUÍDO
Garantia de reembolso Reembolso total se o médico não aprovar o tratamento.
Avaliações
Avaliações verificadas de pacientes Hi-Doctor · nomes alterados por privacidade · os resultados individuais variam.
Discreet from start to finish. The questionnaire was thorough and the doctor adjusted my dose after feedback.
Daniel P.
3 months in treatment
They checked my heart medication before prescribing — that level of care is why I stayed.
Sergio L.
7 months in treatment
Asking questions through the private chat was easy, and the answers came from the actual doctor.
Andreas W.
4 months in treatment
PERGUNTAS FREQUENTES
Descubra se é adequado para si
Responda a algumas perguntas e um médico licenciado na UE analisa o seu caso em 24 horas. Reembolso total se não for adequado para si.
OUTROS TRATAMENTOS DE SAÚDE SEXUAL
Sildenafil is a selective PDE-5 inhibitor EMA-approved for erectile dysfunction in adult men.
WHAT IT IS
Sildenafil is the active ingredient in Viagra and many generics authorised in the EU. It belongs to the PDE-5 inhibitor family alongside tadalafil, vardenafil and avanafil. Each molecule differs in onset, duration and selectivity over secondary receptors.
Its effect is facilitatory, not inductive: it requires sexual stimulation to produce a response — it does not cause an erection on its own.
HOW IT WORKS
During sexual stimulation, the nervous system releases nitric oxide in erectile tissue. Nitric oxide activates guanylate cyclase, raising cGMP levels and relaxing the smooth muscle of penile arteries, increasing blood flow.
Sildenafil blocks PDE-5, the enzyme that degrades cGMP. By inhibiting it, cGMP stays elevated longer and the erectile response is prolonged.
Onset of action is 30–60 minutes after intake; duration is 4–6 hours. Absorption is slowed by fatty meals.
WHO IS A CANDIDATE
The EMA indication is for adult men with erectile dysfunction. The licensed doctor reviews your cardiovascular history, current medication and risk factors. Erectile dysfunction is often an early marker of subclinical cardiovascular disease — ruling that out is part of the evaluation.
It is contraindicated with nitrates (severe hypotension risk), riociguat and specific antiretroviral combinations. The questionnaire is designed to flag these cases.
WHAT TO EXPECT
Sildenafil is taken on demand, about an hour before planned sexual activity. The standard starting dose is 50 mg, adjustable to 25 or 100 mg based on response and tolerance. It should not be taken more than once a day.
In studies, satisfactory clinical response exceeds 70 % in adequately selected patients — the outcome depends on the underlying cause, the dose, and concurrent cardiovascular factors.
SAFETY
The most common side effects are headache, facial flushing, nasal congestion, dyspepsia and transient visual changes (light sensitivity, blue-tinged perception).
Absolute contraindications include concomitant nitrates (nitroglycerin, isosorbide), a history of NAION (non-arteritic anterior ischaemic optic neuropathy) and specific riociguat combinations. The doctor reviews the full questionnaire before prescribing.
Seek emergency care if you experience chest pain, priapism (erection > 4 h) or sudden vision loss.
REVIEWED BY HI-DOCTOR LICENSED PHYSICIANS · EDUCATIONAL CONTENT, NOT A SUBSTITUTE FOR A CONSULTATION
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