Change ED Prescription Now: Fast Switch Online

Need to change your current ED prescription? EverydayMeds makes switching to Viagra or Sildenafil simple with our secure online consultation service. Our UK-licensed clinicians can assess your suitability for treatment and help you find the right option. Complete your consultation today and receive discreet next-day delivery. Choose between branded Viagra or cost-effective generic Sildenafil at checkout.

  • Complete online consultation in minutes
  • UK-licensed prescriber review within hours
  • Choose Viagra (branded) or Sildenafil (generic)
  • Discreet next-day delivery available
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Takes less than 2 minutes to complete, 100% online

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Not sure which one? Here's the honest comparison.

Sildenafil
~60 min
~4 hrs
you like to plan ahead
Tadalafil (as-needed)Most prescribed
~30 min
up to 36 hrs
you want a whole weekend covered
Tadalafil Daily
always active
continuous
you never want to think about timing
Vardenafil
~15–30 min
~8 hrs
you want the fastest onset

How ED treatment works in your body.

Increases blood flow

Increases blood flow

When PDE5 is suppressed, blood is able to flow more freely through the body—including to the (you guessed it) penis.

Increase erections

Increase erections

More blood flow to the penis means harder, more satisfying erections once you're sexually stimulated.

How Viagra Works for Erectile Dysfunction

Reviewed by Mostafa Damghani · 03/07/2026

Understanding How Viagra and Sildenafil Work

Viagra contains the active ingredient sildenafil citrate, which belongs to a class of medications called PDE5 inhibitors. When you're sexually aroused, your body naturally produces nitric oxide, which increases blood flow to the penis. Viagra works by blocking the phosphodiesterase type 5 enzyme, helping to maintain this increased blood flow and support an erection.

It's important to understand that Viagra doesn't cause automatic erections - sexual stimulation is still required for the medication to be effective. The treatment typically begins working within 30-60 minutes of taking it, and its effects can last for 4-6 hours, though this doesn't mean your erection will last this long.

Switching to EverydayMeds - Simple Online Process

If you're currently taking ED medication and want to switch to our service, the process is straightforward. Start by completing our confidential online consultation form, which takes just a few minutes. Our UK-licensed clinicians will review your medical history, current medications, and assess your suitability for treatment.

During the consultation, you'll be asked about your current ED treatment, any side effects you may have experienced, and your overall health. This helps our prescribers determine the most appropriate treatment and dosage for your needs. At checkout, you can choose between branded Viagra or generic Sildenafil - both contain the same active ingredient but Sildenafil offers a more cost-effective option.

Available Dosages and Treatment Options

Both Viagra and Sildenafil are available in three strengths: 25mg, 50mg, and 100mg tablets. Most men start with a 50mg dose, which can be adjusted based on effectiveness and how well the medication is tolerated. The maximum recommended dose is 100mg, and you should never take more than one dose in a 24-hour period.

Our prescribers will recommend the appropriate starting dose based on your consultation responses. If you're switching from another ED medication, they'll consider your previous treatment experience when determining the best option for you.

Safety Considerations and Who Can Use Viagra

Viagra and Sildenafil are prescription-only medicines that require careful clinical assessment. They're suitable for adult men with erectile dysfunction, but certain health conditions and medications can make them unsuitable or require dose adjustments.

The medication cannot be prescribed if you're taking nitrate medications (such as GTN spray), have severe heart disease, very low blood pressure, or severe liver problems. Our consultation process includes thorough safety checks to ensure the treatment is appropriate for you. If you're currently taking any medications, including those for high blood pressure or heart conditions, it's essential to declare these during your consultation.

What to Expect After Starting Treatment

Most men find Viagra or Sildenafil effective for treating erectile dysfunction. The medication should be taken approximately 30-60 minutes before sexual activity, and it's best taken on an empty stomach as fatty foods can delay its effectiveness. You may experience mild side effects such as headache, flushing, or indigestion, which typically resolve on their own.

If your current dose isn't providing the desired results, or if you're experiencing side effects, our clinicians can adjust your treatment during follow-up consultations. We offer ongoing support to ensure you're getting the most from your treatment.

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What you need to know about erectile dysfunction

It's one of the most common conditions we treat, and one of the most treatable.

What is Erectile Dysfunction?
ED means finding it hard to get or keep an erection firm enough for sex. It's not unusual to have an off night; the point at which it's worth doing something is when it's happening regularly, or when it's starting to bother you.
How will I feel when I take ED medication?
For most men, nothing feels different day to day. The medication works in the background — when you're sexually aroused, it helps blood flow where it's needed, so erections come more easily and last longer. It doesn't cause arousal on its own. Some men notice mild, short-lived effects like a headache, facial flushing or a stuffy nose, which usually pass as the dose wears off.
Why do I need a prescription for ED medication?
ED treatments are prescription-only medicines in the UK because they aren't suitable for everyone — for example, alongside certain heart conditions or medications like nitrates. That's why we ask you to complete a short online consultation first. A UK-registered prescriber reviews your answers to make sure your chosen treatment is safe and right for you before it's dispensed.
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How it works

Achieve your goals in just a few simple steps.

Step 1

Start Free Consultation

Select safe UK treatments. Quick answers.

Step 2

Review By Our Clinical Team

Our expert team will use your consultation as the basis of our recommendation and communicate with you.

Step 3

Get it delivered fast

We’ll deliver direct to you, as quickly as tomorrow.

FAQs

Frequently asked questions

Still have questions?

Our UK pharmacists are happy to help. There is no charge and no obligation.

  • Mon–Fri, 9am–5pm
How quickly can I switch my ED prescription to EverydayMeds?
You can complete our online consultation immediately and receive a prescriber review within hours during business days. Once approved, we offer next-day delivery so you can start your new prescription quickly.
Can I choose between branded Viagra and generic Sildenafil?
Yes, at checkout you can select either branded Viagra or generic Sildenafil. Both contain the same active ingredient (sildenafil citrate) but generic Sildenafil offers a more cost-effective option.
Will switching affect my current dosage?
Our prescribers will review your current treatment and may recommend continuing with the same dose or adjusting it based on your consultation responses and treatment history. Any changes will be made safely and gradually.
Do I need to tell you about my current ED medication?
Yes, please include details about your current ED treatment in the consultation form, including the medication name, dosage, and how well it's working for you. This helps our prescribers recommend the most suitable treatment.
What if Viagra doesn't work as well as my current medication?
Our clinicians can adjust your dosage or discuss alternative treatments during follow-up consultations. We provide ongoing support to ensure you receive the most effective treatment for your needs.