Is Viagra Safe? UK Safety Guide | Cured Pharmacy

Clinically Proven UK Registered Pharmacy

Is Viagra Safe? Complete Safety Guide

UK-registered clinical team
Confidential and secure
No GP visit needed
Fast and discreet delivery
Start Your Free Consultation

Takes less than 2 minutes to complete 100% online

EDNEW 20% off for new customers
Genuine Products
UK-licensed only
Fast Delivery
Next-day available
Expert Advice
UK pharmacists
Man using Cured Pharmacy online consultation for erectile dysfunction treatment
From £0.45 Starting dose — clinically approved
LIVE PRICING

Our Pricing

Pricing Disclaimer: Prices on some pages may not be up to date — the live pricing table below and pricing shown during consultation are official current prices and take precedence over any other figures on the site.

Sildenafil - UK-licensed prescription Treatment
Treatment

Sildenafil

From £0.45

Future orders save 5%
Start Assessment
Tadalafil - UK-licensed prescription Treatment
Treatment

Tadalafil

From £9.99

Future orders save 5%
Start Assessment
Sildenafil Eropid - UK-licensed prescription Treatment
Treatment

Sildenafil Eropid

From £8.99

Future orders save 5%
Start Assessment
Tadalafil (Teva) - UK-licensed prescription Treatment
Treatment

Tadalafil (Teva)

From £9.99

Future orders save 5%
Start Assessment
Avarante Tablets Tadalafil Tablets 10mg - UK-licensed prescription Treatment
Treatment

Avarante Tablets Tadalafil Tablets 10mg

From £11.49

Future orders save 5%
Start Assessment
Viagra Connect 50mg - UK-licensed prescription Treatment
Treatment

Viagra Connect 50mg

From £11.49

Future orders save 5%
Start Assessment

Is Viagra Safe? Complete Safety Guide

Published on: June 03, 2026

Wondering is viagra safe uk for your situation? Viagra (sildenafil) has been licensed in the UK since 1998 and is considered safe for most men when prescribed appropriately by a UK healthcare professional. At Cured Pharmacy, our clinical team assesses your medical history to ensure sildenafil is suitable for you, with treatments available from £0.45 per tablet.

Is Viagra Safe? The Clinical Evidence

Viagra contains sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor that has undergone extensive clinical trials involving over 3,700 patients before receiving MHRA licensing in the UK [1]. The medication works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain erections suitable for intercourse.

Long-term safety studies spanning up to four years demonstrate that sildenafil maintains a consistent safety profile with no increase in adverse events over time [2]. The most common side effects—headache, flushing, and nasal congestion—are typically mild and transient, affecting approximately 10-16% of users in clinical trials [1].

For the majority of men without contraindications, sildenafil is considered a safe and effective first-line treatment for erectile dysfunction when used as directed by a UK prescriber [3].

Viagra and Heart Safety: What You Need to Know

One of the most common safety concerns surrounding Viagra relates to cardiovascular risk. Sildenafil does cause a modest, temporary reduction in blood pressure—typically 8-10 mmHg systolic and 5-6 mmHg diastolic—which is clinically insignificant for most healthy men [2].

However, certain heart conditions do create contraindications. Men who have experienced a heart attack, stroke, or life-threatening arrhythmia within the past six months should not use sildenafil [3]. Similarly, those with severe heart failure, unstable angina, or uncontrolled hypertension require careful assessment before treatment.

The most critical interaction involves nitrate medications (such as GTN spray or isosorbide mononitrate). Combining sildenafil with nitrates can cause a dangerous drop in blood pressure and is absolutely contraindicated [1][3]. This is why our UK prescribers thoroughly review your current medications during the online consultation.

Sexual Activity and Cardiac Risk

It's worth noting that sexual activity itself places demands on the cardiovascular system, roughly equivalent to climbing two flights of stairs. If you can perform moderate physical activity without chest pain or severe breathlessness, you're generally suitable for both sexual activity and sildenafil treatment, subject to prescriber approval [2].

Common Viagra Side Effects and How to Manage Them

Clinical trials identify headache as the most frequent side effect, occurring in approximately 16% of men taking sildenafil 50mg [1]. This typically resolves within a few hours and often diminishes with continued use as your body adjusts to the medication.

Facial flushing affects around 10% of users and results from the same vasodilatory mechanism that improves erectile function. Nasal congestion, indigestion, and visual disturbances (such as a blue tinge to vision or increased light sensitivity) occur less frequently but are well-documented effects [1][2].

Most side effects are dose-dependent, meaning they're more common with higher doses. Starting with the lowest effective dose—often 50mg—and adjusting based on response and tolerability is the standard UK prescribing approach.

When to Seek Medical Attention

Priapism—a prolonged erection lasting more than four hours—is rare but requires immediate medical attention to prevent permanent damage. Similarly, sudden vision or hearing loss, though extremely uncommon, warrants urgent assessment. These serious adverse events occur in fewer than 1 in 1,000 users [3].

Treatment Active Ingredient Duration of Action Starting Price
Sildenafil Sildenafil citrate 4-6 hours From £0.45
Viagra Connect Sildenafil citrate 4-6 hours From £11.49
Tadalafil Tadalafil Up to 36 hours From £9.99
Cialis Tadalafil Up to 36 hours From £53.00

Who Should Not Take Viagra?

Absolute contraindications for sildenafil include current use of nitrate medications, severe cardiovascular disease, recent stroke or heart attack, hereditary degenerative retinal disorders, and severe hepatic impairment [3]. Men with anatomical penile deformities or conditions predisposing to priapism (such as sickle cell anaemia or leukaemia) require specialist assessment.

Alpha-blocker medications used for prostate enlargement can interact with sildenafil, potentially causing symptomatic hypotension. If you're taking alpha-blockers, your prescriber may recommend starting with a lower sildenafil dose and ensuring your alpha-blocker therapy is stable [2].

Age alone is not a contraindication—sildenafil has been safely used in men over 65 in clinical trials, though older patients may be more susceptible to side effects and often require lower doses [1]. Our UK clinical team at Cured Pharmacy assesses these factors during your free consultation to determine if sildenafil is appropriate for your individual circumstances.

Viagra vs Tadalafil: Safety Comparison

Both sildenafil and tadalafil are PDE5 inhibitors with similar safety profiles and contraindications. The key difference lies in duration of action rather than safety—tadalafil remains active for up to 36 hours compared to sildenafil's 4-6 hours [4].

Some men find tadalafil's longer half-life offers greater spontaneity, while others prefer sildenafil's shorter action window for occasional use. Side effect profiles are comparable, though tadalafil users report slightly higher rates of back pain and muscle aches, whilst sildenafil is associated more frequently with visual disturbances [4].

From a safety perspective, neither medication is inherently safer—the choice depends on your lifestyle preferences, how frequently you anticipate needing treatment, and how your body responds to each option. Both require the same cardiovascular and medication interaction screening.

Choosing Between Sildenafil and Tadalafil

Your UK prescriber will discuss both options during your consultation. Many men try both medications at different times to determine which suits their needs best. At Cured Pharmacy, we offer both sildenafil (from £0.45) and tadalafil, with transparent pricing shown before you complete your assessment.

How to Use Viagra Safely: Practical Guidance

Safe sildenafil use begins with honest disclosure during your clinical assessment. Inform your prescriber about all medications you're taking, including over-the-counter products and herbal supplements, as interactions can affect both safety and efficacy [3].

Take sildenafil approximately one hour before anticipated sexual activity, though it can work within 30 minutes for some men. Avoid high-fat meals beforehand, as these can delay absorption and reduce effectiveness. Never exceed one dose in 24 hours, and never combine sildenafil with other PDE5 inhibitors [1][2].

Alcohol in moderation is generally safe with sildenafil, but excessive drinking can impair erectile function and increase the risk of side effects such as dizziness or headache. Grapefruit juice may increase sildenafil levels in your bloodstream and should be avoided [3].

Store tablets at room temperature away from moisture and heat. Check expiry dates before use, and never share your prescription with others—even if they describe similar symptoms. Each person's medical history and contraindications are unique, making individualised prescriber assessment essential for safety.

Scientific References

  1. Goldstein, I., Lue, T. F., Padma-Nathan, H., Rosen, R. C., Steers, W. D., & Wicker, P. A. (1998). Oral sildenafil in the treatment of erectile dysfunction. New England Journal of Medicine, 338(20), 1397–1404. https://doi.org/10.1056/NEJM199805143382001 [accessed 13 August 2026]
  2. Jackson, G., Rosen, R. C., Kloner, R. A., & Kostis, J. B. (2006). The second Princeton consensus on sexual dysfunction and cardiac risk: New guidelines for sexual medicine. Journal of Sexual Medicine, 3(1), 28–36. https://doi.org/10.1111/j.1743-6109.2005.00196.x [accessed 13 August 2026]
  3. Medicines and Healthcare products Regulatory Agency. (2023). Sildenafil 25mg, 50mg and 100mg film-coated tablets: Summary of Product Characteristics. GOV.UK. https://www.gov.uk/government/organisations/medicines-and-healthcare-products-regulatory-agency [accessed 13 August 2026]
  4. Carson, C. C., & Lue, T. F. (2005). Phosphodiesterase type 5 inhibitors for erectile dysfunction. BJU International, 96(3), 257–280. https://doi.org/10.1111/j.1464-410X.2005.05614.x [accessed 13 August 2026]
  5. NHS. (2026). Erectile dysfunction (impotence). https://www.nhs.uk/conditions/erection-problems-erectile-dysfunction/ Accessed 13 August 2026.

Information on this page is for educational purposes only and is not medical advice. All prescription treatments require clinical assessment by a UK-registered prescriber. Always consult a qualified healthcare professional before starting any new medication.

Trusted by thousands

Real people, real results

Jane L.

"Brilliant. Lost 4 stone on mounjaro no side effects at all. Cured pharmacy are excellent. Always helpful pens sent out quickly always comes with needles and sterile wipes. If you want to go on GLP-1 go to cured pharmacy. So professional. Thank you cured pharmacy you changed my health and well being."

Ann-Marie

"I absolutely love this product, I have been using 2.5mg as maintenance dose and have managed to control my weight without any side effects and can still eat well balanced meals. The pharmacy is very efficient friendly and helpful I would not purchase from anywhere else."

Sacha W.

"So far I'm really impressed by my results it's crazy cause I'm not snacking like how I used to do and I see my face slimming down already and it's only been 2 and a half weeks. Can't wait to give my feedback in 5 months time thank you cured pharmacy."

Kimberly G.

"Mounjaro has corrected my hormonal weight gain during menopause. I am using it now to maintain that balance. The results for me have been exceptional!"

Jennifer

"Great really helps cure those nasty habits can't wait for my next mounjaro pen."

How it Works?

Select from our recommended UK-licensed medications.

1

Choose your treatment

Step 1: Choose your treatment from Cured Pharmacy

Select safe UK treatments. Quick answers.

2

Answer quick questions

Step 2: Answer quick consultation questions

We will deliver direct to you as quickly as tomorrow.

3

Get it delivered fast

Step 3: Fast discreet delivery to your door

Start Your Assessment For Erectile Dysfunction

Start your journey to better health today.

  • Reviewed by UK-based prescribers
  • Takes under 3 minutes
  • Discreet Packaging

Start Your Journey To Better Health Today

Once you complete a short online assessment you will be able to choose your preferred treatment from safe medically approved options tailored to you.

Start My Assessment

Returning Customer?

Log in to Your Account

Faq

Is Viagra safe for daily use?
Viagra is not typically prescribed for daily use—it's designed for on-demand use, taken approximately one hour before sexual activity. Tadalafil offers a daily low-dose option for men who prefer continuous treatment, subject to prescriber approval.
Is Viagra safe with alcohol?
Moderate alcohol consumption is generally safe with sildenafil, but excessive drinking can reduce erectile function and increase side effects such as dizziness, headache, and low blood pressure.
Is Viagra safe if I have high blood pressure?
Men with controlled hypertension can usually take sildenafil safely, but those with uncontrolled high blood pressure require stabilisation first. Your UK prescriber will assess your blood pressure status during consultation.
Is Viagra safe with diabetes?
Yes, sildenafil is safe for men with diabetes and is frequently prescribed for diabetic patients experiencing erectile dysfunction. Diabetes itself is a common cause of ED, and sildenafil has been extensively studied in this population.
Can Viagra cause a heart attack?
Sildenafil does not cause heart attacks in men without contraindications. Large-scale studies show no increased cardiovascular risk in appropriate candidates, though men with severe heart disease should not use PDE5 inhibitors.
Is Viagra safe for over 70s?
Age alone is not a contraindication for sildenafil. Men over 70 have used Viagra safely in clinical trials, though older patients may require lower doses and are more susceptible to side effects.
Is generic sildenafil as safe as branded Viagra?
Yes, generic sildenafil contains the same active ingredient in the same doses as branded Viagra and meets identical MHRA safety and quality standards. At Cured Pharmacy, all sildenafil products are UK-licensed and clinically equivalent.
How long has Viagra been considered safe in the UK?
Viagra received UK licensing in 1998 and has over 25 years of real-world safety data involving millions of men worldwide. It remains the most extensively studied erectile dysfunction treatment available.
Is Viagra available without a prescription in the UK?
No, Viagra requires a valid prescription in the UK as it's a prescription-only medication. At Cured Pharmacy, our clinicians provide a free online consultation to assess your suitability and issue a prescription if appropriate, making the process convenient and discreet.
How much does Viagra cost at Cured Pharmacy?
Viagra prices at Cured Pharmacy vary depending on dosage and quantity, typically starting from around £4-£6 per tablet for branded Viagra. We also offer more affordable generic sildenafil options with the same active ingredient, providing excellent value without compromising on quality or safety.
Is Viagra safe to use long term?
Yes, Viagra is generally safe for long-term use when taken as prescribed and under medical supervision. Regular check-ups with your healthcare provider are recommended to monitor your cardiovascular health and ensure the medication remains appropriate for you, which Cured Pharmacy's clinicians can facilitate through ongoing consultations.
How quickly can I get Viagra delivered in the UK?
Cured Pharmacy offers fast, discreet delivery across the UK, with most orders arriving within 1-2 working days via Royal Mail. For added convenience, we provide next-day delivery options and all medications are dispatched in plain, unmarked packaging to protect your privacy.
What is the difference between Viagra and generic sildenafil?
Viagra is the branded version while sildenafil is the generic equivalent, both containing the same active ingredient at identical dosages and effectiveness. The main difference is price, with generic sildenafil being significantly more affordable. Cured Pharmacy offers both options so you can choose what suits your needs and budget best.
Tarun Kumar, Prescribing Pharmacist

Medically reviewed by

Tarun Kumar, Prescribing Pharmacist (GPhC 2233073)

Reviewed on: June 03, 2026

Last reviewed: 13 August 2026

Last updated on 13 August 2026.

Review History

Our experts continually monitor new findings in health and medicine, and we update our articles when new information becomes available.

Why this page was updated on 13 August 2026

Content checked and updated as part of our periodic review, to ensure accuracy and currentness.

Current version (13 August 2026)

Edited by: The Editorial Team

Medically reviewed by:

Tarun Kumar, GPhC No. 2233073, Prescribing Pharmacist


How we source info.

When we present you with stats, data, opinion or a consensus, we'll tell you where this came from.