Understanding PDE5 Inhibitors: The Science Behind Erectile Dysfunction Treatment
Thinking about PDE5 inhibitors for erectile dysfunction? Get your prescription online from an EU-licensed doctor in under 24 hours. €25 consultation fee, valid at any EU pharmacy. Hi-Doctor makes it simple and discreet.

Understanding PDE5 Inhibitors: The Science Behind Erectile Dysfunction Treatment
Searching for a PDE5 inhibitor prescription online in the EU? You've come to the right place. Hi-Doctor connects you with EU-licensed doctors who can review your case and, if appropriate, issue a prescription for PDE5 inhibitors like sildenafil or tadalafil. Get your prescription in under 24 hours for a flat €25 consultation fee, valid at any pharmacy across the EU. No risk — if the doctor says no, you get your money back.
How it works — get your PDE5 inhibitor prescription in 4 steps
- Fill out our quick online medical questionnaire (2–3 minutes) and pay the €25 consultation fee.
- A licensed EU doctor individually reviews your case in private. If the doctor determines that PDE5 inhibitors are NOT appropriate for you, your €25 consultation fee is **refunded automatically** — no risk.
- If approved, you receive a REMPE electronic prescription (a downloadable PDF file) in your Hi-Doctor account and by email within 24 hours.
- Print the PDF or show it on your phone — present it at **any pharmacy in the EU** to collect your medication. This prescription is issued under the Spanish system but is recognised EU-wide under cross-border prescription directive 2011/24/EU.
Who qualifies for PDE5 inhibitors
Our EU-licensed doctors assess your medical history to ensure PDE5 inhibitors are safe and effective for you. They look for specific criteria, including a confirmed diagnosis of erectile dysfunction and no contraindications to the medication. Key factors the doctor considers include:
- Your overall cardiovascular health.
- Any existing medical conditions such as heart disease, uncontrolled high blood pressure, or liver/kidney issues.
- All medications you are currently taking, especially nitrates (often used for chest pain) or alpha-blockers, which can interact dangerously with PDE5 inhibitors.
- Your current lifestyle and any psychological factors contributing to ED.
The doctor's review ensures your safety and the appropriateness of the treatment.
What PDE5 inhibitors actually do (and don't do)
PDE5 inhibitors, such as sildenafil (Viagra) and tadalafil (Cialis), work by enhancing your body's natural response to sexual arousal. When you are sexually stimulated, your body releases nitric oxide, which leads to the production of cGMP. cGMP relaxes the smooth muscles in the penis, allowing increased blood flow and an erection.
The enzyme PDE5 typically breaks down cGMP. PDE5 inhibitors block this enzyme, allowing cGMP levels to remain higher for longer. This means that when you are sexually stimulated, it's easier to achieve and maintain an erection.
It's crucial to understand that PDE5 inhibitors do not cause spontaneous erections. Sexual stimulation is still required for the medication to work. They simply facilitate the natural process, making it more effective. They are not a cure for erectile dysfunction but an effective treatment to manage its symptoms.
Side effects and when to stop
Like all medications, PDE5 inhibitors can have side effects. Most are mild and temporary. Common side effects include:
- Headaches
- Facial flushing
- Nasal congestion
- Indigestion
- Dizziness
More serious side effects are rare but require immediate medical attention. These include a sudden decrease or loss of vision or hearing, or an erection lasting more than four hours (priapism). Always follow your doctor's instructions and inform them of any concerning symptoms. If you experience severe side effects, stop taking the medication and seek emergency care.
Why Hi-Doctor vs. walking into a clinic
Choosing Hi-Doctor for your PDE5 inhibitor prescription offers significant advantages over traditional in-person clinic visits:
- Speed: Get your prescription in under 24 hours versus waiting weeks for an appointment.
- Price: A flat €25 consultation fee, compared to variable and often higher private clinic fees.
- Privacy: Everything happens securely within our app and your private account — no awkward waiting rooms or reception desk conversations.
- Convenience: Consult from anywhere, anytime, using your phone or computer. No need to travel to a city-centre clinic.
- Trust: Join over 50,000 satisfied patients. We proudly maintain a 4.8 Trustpilot rating, reflecting our commitment to patient care and service.
- EU-wide validity: Our REMPE prescriptions are valid at any pharmacy across the EU, making it incredibly easy to collect your medication.
Frequently asked questions
What happens if the doctor decides I'm not a candidate for PDE5 inhibitors?
If our EU-licensed doctor determines that PDE5 inhibitors are not appropriate for your medical condition, your €25 consultation fee is refunded automatically. You pay nothing if the treatment isn't approved.
Is the REMPE prescription valid outside Spain?
Yes, absolutely. REMPE is Spain's official private electronic prescription standard. Under EU Directive 2011/24/EU, any EU pharmacy (e.g., in France, Germany, Italy, Portugal, Netherlands, Belgium, Austria, Ireland) must recognise and dispense from it. You receive a downloadable PDF you can print and present.
How do I actually collect the medication once I have the prescription?
Simply print the PDF prescription or show it on your phone to the pharmacist at any EU pharmacy. The pharmacist will scan the QR code or verify the digital signature and dispense your medication.
Is it legal to get PDE5 inhibitors online in my country?
Yes, it is legal to obtain PDE5 inhibitors via an EU-licensed doctor and a valid REMPE prescription. This process adheres to all EU regulations for cross-border healthcare.
How long does the prescription take?
Once you complete your medical questionnaire and payment, an EU-licensed doctor will review your case. If approved, you will receive your REMPE electronic prescription (PDF) within 24 hours.
Is my data private?
Yes, your privacy is our top priority. All your data and medical information are handled according to strict RGPD-compliant standards. Our in-app chat ensures private, auditable communication directly with your doctor.
How much does it cost?
The online consultation with an EU-licensed doctor costs a flat €25. This fee covers the doctor's review of your case. If the doctor determines the treatment is not appropriate, your €25 is fully refunded.



