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Erectile Dysfunction Medication: What to Do If You Miss a Dose

Missed a dose of your ED medication? Get clear guidance on what to do next. Find out how to get your Erectile Dysfunction medication prescription online quickly and discreetly from an EU-licensed doctor for just €25, with pickup.

1 February 2026
Erectile Dysfunction Medication: What to Do If You Miss a Dose —

DIRECT ANSWER

An online consultation lets an EU-licensed doctor review your case and, if appropriate, issue a prescription that is valid across the EU.

Less than 4 hours on average

Prescription issued in less than 4 hours on average if approved.

EU-licensed doctors

Every case is reviewed by a licensed clinician.

Valid across the EU

Approved prescriptions can be used at any EU pharmacy.

In this article

Dealing with erectile dysfunction (ED) is common, and managing your medication effectively is key. If you've missed a dose of your ED medication like sildenafil (Viagra), tadalafil (Cialis), vardenafil (Levitra), or avanafil (Spedra), it's crucial to know how to proceed safely. This guide helps you understand what to do and how you can get your Erectile Dysfunction medication prescription online, quickly and discreetly, from an EU-licensed doctor. For just €25, an EU-licensed doctor reviews your case, and if appropriate, you'll receive a prescription within 24 hours, valid at any pharmacy in the EU.

How it works — get your Erectile Dysfunction medication prescription in 4 steps

  1. Fill the online medical questionnaire (2–3 minutes) and pay the €25 consultation fee.
  2. A licensed EU doctor reviews your case in private. If the doctor determines the treatment is not appropriate, your €25 is refunded automatically — no risk.
  3. If approved, you receive a REMPE electronic prescription (PDF file) in your Hi-Doctor account and by email within 24 hours.
  4. Print the PDF or show it on your phone — present it at any pharmacy in the EU to collect the medication.

Who qualifies for Erectile Dysfunction medication

An EU-licensed doctor assesses your medical history to determine if ED medication is safe and appropriate for you. Generally, doctors look for:

  • A confirmed diagnosis of erectile dysfunction.
  • No severe cardiovascular conditions that could be worsened by ED medication.
  • No current use of nitrate medications (e.g., nitroglycerin) for chest pain, as combining these can cause a dangerous drop in blood pressure.
  • No severe liver or kidney disease.
  • No history of non-arteritic anterior ischemic optic neuropathy (NAION), a condition that can cause vision loss.

During your online consultation, you will provide all necessary medical information to help the doctor make an informed decision.

What Erectile Dysfunction medication actually does (and doesn't do)

Erectile Dysfunction medications like sildenafil and tadalafil work by increasing blood flow to the penis during sexual stimulation. They are phosphodiesterase-5 (PDE5) inhibitors. This means they relax the blood vessels in your penis, allowing more blood to flow in, which helps you achieve and maintain an erection. They do not work without sexual stimulation; they are not aphrodisiacs.

Key differences:

  • Sildenafil (Viagra) and Vardenafil (Levitra): Typically taken 30-60 minutes before sexual activity, effects last about 4-5 hours.
  • Tadalafil (Cialis): Available as an as-needed dose (effects last up to 36 hours, earning it the nickname 'the weekend pill') or a daily low dose for continuous effect.
  • Avanafil (Spedra): Works quickly, often within 15-30 minutes, with effects lasting up to 6 hours.

These medications are effective for most men with ED, but they do not cure the underlying cause of ED. They treat the symptoms, allowing for improved sexual function.

Side effects and when to stop

Like all medications, ED treatments can have side effects. Most are mild and temporary. Common side effects include:

  • Headache
  • Flushing (redness of the face)
  • Nasal congestion
  • Indigestion
  • Back pain (more common with tadalafil)

Serious side effects are rare but require immediate medical attention:

  • Sudden decrease or loss of vision in one or both eyes.
  • Sudden decrease or loss of hearing.
  • Priapism (an erection lasting more than 4 hours).
  • Symptoms of a heart attack (chest pain, shortness of breath, dizziness).

Always inform your doctor about all medications you are taking, especially nitrates, alpha-blockers, and certain antifungal or antibiotic drugs, as interactions can be dangerous. If you experience any severe or concerning side effects, stop taking the medication and consult a doctor immediately.

Why Hi-Doctor vs. walking into a clinic

Getting your Erectile Dysfunction medication prescription through Hi-Doctor offers distinct advantages over traditional clinic visits:

  • Speed: Receive your prescription in under 24 hours, compared to weeks of waiting for an in-person appointment.
  • Price: A flat €25 online consultation fee, with a money-back guarantee if treatment is not appropriate. Clinic fees can be variable and higher.
  • Privacy: Everything happens in your secure, RGPD-compliant Hi-Doctor account. No awkward reception desk conversations or waiting rooms.
  • Convenience: Complete your consultation from your phone or computer, anywhere in the EU. No travel to a city-centre clinic.
  • Trust: Over 50,000 patients served with a 4.8 Trustpilot rating. Our EU-licensed doctors review every case individually.

COMMON QUESTIONS

Frequently asked questions

If the EU-licensed doctor determines that Erectile Dysfunction medication is not appropriate for you, your €25 consultation fee is refunded automatically. You pay nothing if the treatment isn't approved, ensuring a no-risk assessment.

Licensed EU doctors
Doctor review in less than 2 hours on average
50,000+ patients served
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