The Sildenafil in Viagra is one of a number of PDE5 enzyme inhibitors.
Over-the-Counter ED Medications: What’s available in the UK
Women should never take Sildenafil, and nobody under the age of 18 – male or female. And, of course, if you don’t have erectile dysfunction, you shouldn’t use Sildenafil. If you’ve been told by the doctor not to have sex – perhaps due to lack of fitness or a recent acute myocardial infarction (AMI) or stroke, you should also avoid Sildenafil. And generally, men who have had other heart problems needing care. These include: low blood pressure or uncontrolled high blood pressure (pulmonary arterial hypertension); unstable angina (chest pain), irregular heartbeat or palpitations (arrhythmia); valvular heart disease; cardiomyopathy; problems causing blood flow issues. Alternatives include Tadalafil (Cialis), Vardenafil (Levitra) and Avanafil (Spedra) – for which you do still need a prescription. Join more than 100,000 happy customers who have used Manual No names, no logos, no delivery fee.
- The side effect profile of ED tablets varies among individuals.
- Certain foods can affect the absorption of ED medications.
- Tadalafil's long duration makes it preferred for spontaneity.
- Before using ED drugs, discuss potential allergies with a doctor.
- UK hospitals refer patients to licensed pharmacies for ED meds.
- Cost-effective options include generic forms available in the UK.
- Men using ED medication should avoid grapefruit juice.
- ED tablets can be part of a broader treatment plan.
- All ED drugs should be taken as per medical advice.
- Regular health checkups can improve ED management outcomes.
All content on this page has been medically reviewed by: Hassan Thwaini, Clinical Pharmacist and Copywriter, Master of Pharmacy (MPharm) on 30 March, 2026. Find the clinically proven ED treatment that suits you best. 4.6* from over 33,000 people like you. Here’s the breakdown of what happens in your body to get the blood flowing again:1 Arousal triggers cGMP, a molecule that boosts blood flow to the penis and helps you get an erection. In people with ED, an enzyme called PDE5 breaks down cGMP too quickly, reducing blood flow and causing the erection to fade. ED treatments block PDE5, helping more blood reach the penis.
| Product | Dosage | Quantity + Bonus | Price | |
|---|---|---|---|---|
| Apcalis SX Oral Jelly | 20mg | 17 + 4 Sachets | 95.52€ 90.97€ | |
| Levitra Generic | 60mg | 90 + 6 Pills | 291.82€ 277.92€ | |
| Levitra Professional | 20mg | 360 + 6 Pills | 914.63€ 871.08€ | |
| Cialis Generic | 40mg | 180 + 10 Pills | 277.29€ 264.09€ | |
| Cialis Professional | 20mg | 360 + 6 Pills | 807.03€ 768.60€ | |
| Levitra Original | 20mg | 14 + 2 Pills | 102.27€ 97.40€ | |
| Viagra Oral Jelly | 100mg | 110 + 9 Sachets | 284.63€ 271.08€ | |
| Kamagra | 100mg | 32 Pills | 121.24€ 115.47€ | |
| Kamagra 100 mg | 100 mg | 180 + 6 Pills | 436.79€ 415.99€ | |
| Cialis Professional | 20mg | 60 + 2 Pills | 183.83€ 175.08€ | |
| Super Kamagra | 160 mg | 12 Pills | 101.10€ 96.29€ | |
| Cialis Super Active | 20mg | 20 + 4 Pills | 92.35€ 87.95€ | |
| Cialis Soft Tabs | 20mg | 10 Pills | 39.03€ 37.17€ | |
| Viagra Generic | 100mg | 10 Pills | 28.91€ 27.53€ | |
| Viagra Generic | 50mg | 270 + 8 Pills | 198.48€ 189.03€ |
This leads to firmer, longer-lasting erections. Treat the symptoms with ED medication, and get 50% off an ED blood test to investigate the underlying cause.2-5 1 in 3 men with ED have low-T If left untreated, leads to higher risk of stroke and heart attacks 62% of people with heart disease have ED If left untreated, vascular problems can be fatal 65% of men with diabetes have ED Around 80-85% of people with type 2 diabetes are overweight or obese Untreated diabetes can lead to blindness, kidney failure and heart attacks Reclaim your confidence in the bedroom with clinically proven ED treatments delivered to your door.
| Supplement Name | Active Components | Typical Dose | Reported Benefits | Safety Notes | Price Range (£) |
|---|---|---|---|---|---|
| Ginseng Extract | Panax ginseng | 200-400 mg | Improved stamina, libido | Not a substitute for prescribed meds | 10-30 |
| L-Arginine | Amino acid | 500-2000 mg | Increased nitric oxide | May cause gastrointestinal issues | 5-15 |
| Horny Goat Weed | Epimedium extract | 250-500 mg | Enhanced erectile function | Limited scientific evidence | 8-20 |
| Maca Root | Lepidium meyenii | 1.5-3 g | Boosts libido | No significant known risks | 10-25 |
Take a simple blood test to uncover what’s really going on. Speak with our men’s health experts to make a plan that tackles the root cause, not just the symptoms.
Medication details
Other conditions may prohibit the use of Sildenafil, such as anatomical deformation of the penis (e.g. And you should also confirm with your GP if you’re taking nitrates (nicorandil or other nitric oxide donors e.g. amyl nitrite), or recreational stimulant drugs (e.g. cocaine, MDMA); riociguat or other blue sex pills guanylate cyclase stimulators; ritonavir; CYP3A4 inhibitors, e.g. Before using Sildenafil, please read the Patient Information Leaflet supplied with your medication. Around 40% of men with erectile dysfunction have an underlying health issue that may contribute to their symptoms.1 We provide a comprehensive assessment of key health areas linked to ED to help identify possible causes. Optimal levels of testosterone ensure healthy bodily functions. Lower levels of the hormone can impact libido, sexual function, energy, and mood. Erectile dysfunction can be an early warning sign of coronary heart disease.
- ED tablets interact with certain antibiotics (erythromycin) and antifungal medications (ketoconazole).
- Combining PDE5 inhibitors with recreational drugs like poppers (amyl nitrite) is extremely dangerous.
- HIV protease inhibitors like ritonavir can increase ED tablet levels and require dose adjustment.
- Always list all current medications to a doctor before starting any ED tablet.
This test will help you to determine your risk and take action sooner.
Chemical synthesis
And a small amount probably won't hurt. But side effects can be serious and, at the very least, they can spoil the fun. If Sildenafil does not work, try taking it at least a couple of hours after a meal. Fatty foods can slow down the onset of the drug, meaning you might miss optimal timings. Remember, it's best if you take Sildenafil about an hour before sex to ensure that it’s fully absorbed.
How to take it for best results
We recommend that you try treatment eight different times before trying another ED treatment. This does not apply if you experience serious side effects, in which case you should stop immediately. If Sildenafil stops working, it may mean a couple of things: If Sildenafil passes its shelf life, it may not work as effectively. This can happen if you take Sildenafil for many years. If this is the case, try a different ED medication, like Tadalafil.
Can you permanently get rid of ED?
The causes of your erectile dysfunction have worsened. In some cases, the artery supplying your penis may be blocked completely. If Sildenafil stops working, talk to a Manual clinician. “It’s put a spark back into my relationship and given me a huge amount of confidence in the bedroom.” Enabling the mission of revolutionising how men approach health, they are at the core of the men's wellness platform. Speak with one of our clinicians and get personalised advice. High cholesterol levels impact blood flow around the body and can therefore be a contributor to erectile dysfunction. This test will give you a clear picture of your levels.
Spedra (Avanafil) 100mg - 4 Tablets
Curated by Dr. Earim Chaudry, Manual Medical Director When and how should I start treatment? What are the common side effects of Sildenafil? At Manual, we are experts on erectile dysfunction. In many patients, it can be caused by a combination of factors, and so do we advise having a GP checkup.
Regional variations in prescribing
If you decide to treat your ED, an oral medication like Sildenafil is the most popular way to start. Some men find just knowing it’s available to help improves their sexual confidence, and 80% of men who take Sildenafil will achieve erections strong enough for sex. When and how should ed tablets I start treatment? Here at Manual, all of our medication comes from the officially accredited Manual Pharmacy. Before you buy, you will receive a consultation from one of our clinicians, who are all registered with the UK’s General Pharmaceutical Council.
What does Tadalafil look like?
Our pharmacist will prescribe you the correct dose of Sildenafil to best treat your ED. The normal dosage of Sildenafil is 50mg, and this has the desired effect for the vast majority of men who use it. It can also be taken in 25mg and 100mg forms. When you take Sildenafil for the first time, the most important thing is to relax and enjoy some sexual stimulation. This will give the drug the best chance to kick in and help you get the firm erection you’re looking for. It's not just about being ready in the bedroom. Specialists in medicine, nutrition, performance, and sexual health. BSc (Hons) MBBS MRCGP AFHEA MA (Hons) AFMCP I felt fairly comfortable talking to my partner about my ED. I was actually more nervous speaking to the doctor about it, but when I found Numan, I realised it was very easy to get it sorted discreetly. I think any sort of relationship where you can’t fulfil someone’s needs is a bit of a deal breaker.
| Aspect | Prescription Needed | Over-the-Counter Availability | Notes |
|---|---|---|---|
| Typical in the UK | Yes | No | Sildenafil and Vardenafil generally require prescription |
| OTC Options in the UK | No | Limited (some herbal remedies) | Mostly herbal or natural supplements, not regulated drugs |
| Prescription Process | GP Consultation | N/A | Prescription issuance after medical evaluation |
| Legal Restrictions | Yes | No | Regulations vary for each medication |
It’s given me confidence as I know it’s going to work. Numan is brilliant as there are so many different options to choose from.
What Tests Will a Urologist Do if I Have ED?
Learn more about first-time use of Sildenafil on our blog. Sildenafil is the world’s most counterfeited drug – and there are many online vendors trying to pull a fast one. So if it looks like too much of a good deal, it most likely is. Sildenafil was first brought to the UK market by global pharmaceutical giants, Pfizer, and it was only available under their brand name, Viagra. This exclusivity meant the price tag was high and many men couldn’t afford this type of legitimate ED medication.
2. Can erectile dysfunction be cured completely?
In 2013, however, Pfizer’s patent expired, and it became legal to manufacture the drug under its generic name, Sildenafil. Here at Manual, we provide a digital consulting service. The recommended retail price for branded Viagra Connect is equivalent to about £5 per pill. At Manual, the same Sildenafil is available for as little as £2 per tablet. Firstly, it’s important to know that side effects are rare.
How to take it and common dosing approaches
However, when they do occur, the most common side effects of Sildenafil are: headaches, facial flushing, indigestion, nasal congestion, dizziness, nausea, hot flushes, vision changes (such as having a blue colour tinge, or blurred vision). Serious side effects can become more common when Sildenafil is misused, mixed with excessive alcohol, or due to drug interactions with other medications. Although rare, Priapism (an erection that lasts for 4 hours or more) is a serious side effect that requires immediate medical attention. Please read the patient information leaflet carefully for a full list of side effects and advice. As with any drug, if you notice any adverse effects, stop taking it and seek medical advice. I tried a few different plans and found that a daily treatment suited me best. Whenever love is in the air, I’m ready. It’s given me a lot more confidence in myself and with my partner.
Non-medical use
Some men prefer it as it offers more flexibility — you won't have to pop a pill every time before sexual activity. It is safe to obtain Sildenafil online. But you should be careful where you buy it. Viagra and other ED treatments are some of the most counterfeited drugs globally, and the trouble with the internet is you can't always be sure what you’re buying is the real deal. Only buy drugs, including Sildenafil, from a registered, accredited pharmacy.
ED drugs and interaction with Nitroglycerin
Look for the Registered Pharmacy Logo and number. Yes, you can buy Sildenafil without a prescription. But you’ll have to answer a few questions from the pharmacist first. These include questions about your medical history, such as any medical conditions you may have or medications you’re currently taking. We do not recommend dividing Sildenafil tablets.
UK-based clinical team
They’re designed to be taken whole, so you know exactly how much you’re taking. If you need a smaller dose, get in touch with us. You can drink with Sildenafil, but we recommend that you keep alcohol consumption to a minimum. That's because alcohol can exacerbate the medication’s possible side effects. We get that you might want a glass of wine or two to get in the mood. I had a few misconceptions about the treatment which Numan has explained really well.
- Combining ED tablets with certain medications can be dangerous.
- Tadalafil's availability has increased in UK pharmacies.
- The UK version of Viagra is available at a lower cost than branded.
- Users should be aware of the potential for drug interactions.
- Some ED treatments also help with enlarged prostate symptoms.
- Educational campaigns in the UK promote safe ED medication use.
- The effectiveness of ED tablets can improve with healthy lifestyle choices.
- UK pharmacies often require age verification before dispensing ED meds.
- Pharmacists can advise on the best ED treatment options in the UK.
- Men are encouraged to discuss emotional impacts of ED with professionals.
It's just given me a lot more self-belief when it comes to being intimate. Rabijewski M, Papierska L, Kozakowski J, Zgliczyński W. The high prevalence of testosterone deficiency in population of Polish men over 65 years with erectile dysfunctions.
- Some men wrongly believe ED tablets work instantly – they require sexual stimulation.
- ED tablets are not aphrodisiacs; they only help achieve and maintain erections.
- Taking more than the prescribed dose does not improve effectiveness and increases risks.
- ED tablets cannot cure underlying causes like low testosterone or psychological issues.