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Sildenafil Dosage Guide: 25mg, 50mg, or 100mg?

Looking for a Sildenafil prescription online in Spain, Portugal, or any EU country? Get an electronic prescription from an EU-licensed doctor in under 24 hours for just €25. Pick up your Sildenafil at any EU pharmacy.

6 April 2026
Sildenafil Dosage Guide: 25mg, 50mg, or 100mg?

Sildenafil Dosage Guide: 25mg, 50mg, or 100mg?

You want to get a Sildenafil prescription online in the EU. Good news: you can. Hi-Doctor connects you with EU-licensed doctors who review your case confidentially. If treatment is appropriate, you receive a valid REMPE electronic prescription in under 24 hours. The consultation is just €25, and your prescription is valid at any EU pharmacy – from Spain to Germany. No waiting rooms, no fuss, just discreet access to the medication you need.

How it works — get your Sildenafil prescription in 4 steps

  1. Fill the online medical questionnaire (2–3 minutes). Provide your health details so our EU-licensed doctors can assess your needs.
  2. A licensed EU doctor reviews your case in private. Our doctors carefully evaluate your information to ensure Sildenafil is safe and appropriate for you.
  3. If appropriate, you receive a REMPE electronic prescription within 24 hours. This prescription is delivered securely to your private Hi-Doctor account and via email.
  4. Pick up your medication at any EU pharmacy. Your electronic prescription is valid across the European Union, making it easy to get your Sildenafil.

Who qualifies for Sildenafil

Our EU-licensed doctors look for specific criteria to determine if Sildenafil is appropriate for you. Generally, Sildenafil is prescribed for men experiencing erectile dysfunction. Factors considered include your overall health, existing medical conditions, and any other medications you are currently taking. Doctors will assess for contraindications such as severe heart conditions, recent stroke or heart attack, low blood pressure, or use of nitrate medications. Your safety is our priority, and the doctor only issues a prescription if they find it medically appropriate for your individual health profile.

What Sildenafil actually does (and doesn't do)

Sildenafil, widely known as Viagra, helps men achieve and maintain an erection suitable for sexual activity. It belongs to a class of drugs called PDE5 inhibitors. When sexually stimulated, Sildenafil increases blood flow to the penis by relaxing blood vessels. This makes it easier to get an erection. It's important to understand that Sildenafil does not cause an erection on its own; sexual stimulation is still required. It typically starts working within 30 to 60 minutes and its effects can last for up to 4 hours. Sildenafil does not cure erectile dysfunction, nor does it increase sexual desire or protect against sexually transmitted infections.

Side effects and when to stop

Like all medications, Sildenafil can cause side effects. Common side effects include headache, flushing, nasal congestion, indigestion, and temporary visual disturbances like blurred vision or a bluish tinge. These are usually mild and temporary. More serious, but rare, side effects include sudden vision loss, sudden hearing loss, or an erection lasting more than 4 hours (priapism). If you experience any severe side effects, stop taking Sildenafil immediately and seek urgent medical attention. Always inform the doctor reviewing your case about all your medical conditions and medications to minimise risks.

Why Hi-Doctor vs. walking into a clinic

Choosing Hi-Doctor for your Sildenafil prescription offers unparalleled convenience and privacy. Forget weeks of waiting for an appointment; our EU-licensed doctors review your case and issue a prescription in under 24 hours. The consultation is a flat €25, significantly more transparent and often more affordable than variable private clinic fees. All communication happens securely within our app, ensuring your privacy completely – no reception desks, no waiting rooms, no awkward conversations. With over 50,000 patients served and a 4.8 Trustpilot rating, Hi-Doctor provides a trusted, RGPD-compliant, and auditable online service from the comfort of your home. Get your Sildenafil prescription online in the EU, hassle-free.

Frequently asked questions

Is it legal to get Sildenafil online in the EU?

Yes, it is legal to obtain a Sildenafil prescription online from EU-licensed doctors who operate within EU regulations, like those at Hi-Doctor. Your prescription will be valid across all EU member states.

How long does the prescription take?

If the doctor finds treatment appropriate, you will receive your REMPE electronic prescription for Sildenafil within 24 hours of completing your medical questionnaire.

Can I use the prescription at any EU pharmacy?

Absolutely. The electronic prescription issued by our EU-licensed doctors is valid at any pharmacy throughout the European Union.

What happens if the doctor says no?

Our EU-licensed doctors prioritise your safety. If, after reviewing your medical questionnaire, they determine Sildenafil is not appropriate or safe for you, no prescription will be issued. In such cases, your €25 consultation fee is fully refunded.

Is my data private?

Yes, your data is completely private and secure. Hi-Doctor is RGPD-compliant, and all your information and communications are handled with the highest level of confidentiality within your private account.

How much does it cost?

The online consultation with an EU-licensed doctor costs a flat fee of €25. This fee covers the doctor's review of your case and the issuance of a prescription if appropriate. The cost of the medication itself will be paid at the pharmacy.

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