Viagra alternatives: Other ED treatments explained

DoktorABC editorial team

Accurate, up-to-date health information written by our editorial team and reviewed by UK-registered prescribers.

Why might someone look for a Viagra alternative?

The most common reasons include:

• Side effects: Headache, facial flushing, nasal congestion, and visual disturbances are the most frequently reported side effects of sildenafil. Some men find these difficult to manage.
• Duration: Viagra's 4-6 hour window does not suit all lifestyles. Some men prefer a longer-acting option.
• Food interaction: Viagra's absorption is reduced by high-fat meals. Men who find this inconvenient may prefer an alternative without this restriction.
• Cost: Generic sildenafil is widely available at low cost, but some men on branded Viagra may not be aware of the generic option.
• Contraindications: Sildenafil is contraindicated for men taking nitrate medications and those with certain cardiovascular conditions.
• Insufficient efficacy: Some men find Viagra does not produce adequate results at the standard doses.

Prescription alternatives to Viagra

All licensed ED medications in the UK work through the same fundamental mechanism (PDE5 inhibition) but differ in onset, duration, dosing, and tolerability profile.

Cialis (tadalafil)

Tadalafil is the most widely used alternative to sildenafil in the UK. It is available as Cialis (branded) or generic tadalafil, and offers two key advantages over Viagra: a significantly longer duration of up to 36 hours, and a daily low-dose option (2.5 mg or 5 mg) that removes the need to time doses around sexual activity.

Tadalafil is not significantly affected by food, making timing more flexible. Back pain and muscle aches are more commonly reported with tadalafil than with sildenafil. For a detailed comparison, see our Cialis vs Viagra guide.

Levitra (vardenafil)

Vardenafil is another PDE5 inhibitor available in the UK, marketed as Levitra. It has a similar onset and duration to sildenafil (30-60 minutes onset; 4-6 hours duration) and is available in 5 mg, 10 mg, and 20 mg doses. Some clinical evidence suggests vardenafil may be effective in men who have not responded adequately to sildenafil, though individual responses vary. It is available in branded and generic forms.

Avarante (avanafil)

Avanafil is a newer, third-generation PDE5 inhibitor licensed in the UK as Avarante. Its primary advantage over sildenafil is a faster onset, potentially taking effect in as little as 15-30 minutes. It also has a lower incidence of visual disturbances due to its higher selectivity for PDE5. It is not available in generic form in the UK as of April 2026, making it more expensive than generic sildenafil or tadalafil. See our Avarante vs Viagra guide for a full comparison.

Comparison table

Generic sildenafil: A cost-effective alternative to branded Viagra

For men currently paying for branded Viagra, generic sildenafil is the most straightforward alternative. It contains the same active ingredient at the same dose, meets the same MHRA standards, and produces identical clinical effects at a fraction of the price.

Natural alternatives to Viagra

Some dietary and lifestyle factors have evidence supporting their role in erectile function, though none replicate the pharmacological mechanism of prescription PDE5 inhibitors.

Lifestyle changes with the strongest evidence include regular aerobic exercise, weight management, smoking cessation, and reducing alcohol intake. These address the underlying vascular and hormonal factors that contribute to ED and offer health benefits well beyond sexual function.

Certain foods containing L-arginine (nuts, seeds, legumes), flavonoids (berries, citrus, dark chocolate), and zinc (oysters, red meat, pumpkin seeds) are associated with vascular health that may support erectile function. The evidence is largely observational rather than from clinical trials.

Supplements marketed for ED (including Korean red ginseng, maca root, and L-arginine) have limited and variable evidence. None are recommended by the NHS as treatments for ED, and several commercial products marketed as "natural Viagra" have been found by the MHRA to contain undisclosed pharmaceutical ingredients.

Psychological therapy as an alternative

ED is not always primarily physical. Psychological factors including performance anxiety, depression, relationship stress, and past trauma contribute to ED in a significant proportion of men, particularly younger men. Where psychological factors are the primary or contributing cause, pharmaceutical treatment addresses the symptom rather than the cause.

Cognitive behavioural therapy (CBT), psychosexual therapy, and couples counselling have an evidence base for psychogenic ED. The NHS offers referrals to psychosexual therapy in some areas; your GP can advise on local availability. Private psychosexual therapists are also accessible without a GP referral.

Vacuum erection devices and other non-pharmaceutical options

Vacuum erection devices (VEDs) use suction to draw blood into the penis, producing an erection that is maintained with a constriction ring. They are available without a prescription in the UK and are recommended in NHS clinical guidelines as an effective non-pharmaceutical option, particularly for men who cannot use PDE5 inhibitors due to contraindications.

Penile injections (alprostadil, marketed as Caverject or MUSE) are another prescription option for men who do not respond to oral PDE5 inhibitors. They are administered directly and are typically offered through specialist urology services.

Is it worth trying Viagra again before switching? 

Before switching to an alternative, it is worth considering whether Viagra itself might work better with some adjustment:

• Dose: Men on 25 mg or 50 mg who are not achieving adequate results may benefit from increasing to the 100 mg maximum licensed dose under prescriber guidance.
• Timing: Viagra should be taken 30-60 minutes before sexual activity on an empty stomach or after a light meal. Taking it after a heavy meal reduces absorption.
• Stimulation: Viagra requires sexual arousal to work. If sufficient stimulation is not present, the medication will not produce its full effect regardless of dose.

If optimising these factors does not resolve the issue, a prescriber can guide a structured switch to an alternative.

How to discuss alternatives with your doctor or online clinic

When discussing alternatives with your GP or a UK-registered prescriber, the following information is useful to have ready:

• Which medication you have tried and at what dose
• Whether the issue is insufficient efficacy, side effects, or practical inconvenience
• Any relevant medical history, particularly cardiovascular conditions or current medications
• Your lifestyle and how frequently you need treatment (this affects whether a daily option is more practical)

DoktorABC connects UK patients with licensed prescribers who can review treatment history, assess suitability for alternatives, and issue private prescriptions where clinically appropriate.

Final thoughts

There is no universal best alternative to Viagra. The right choice depends on your individual health profile, lifestyle, the reason Viagra is not working for you, and what you are looking for in a treatment. A structured conversation with your prescriber, rather than switching medications independently, is the most reliable route to finding an approach that works.

FAQ

The DoktorABC medical advisory board

Dr. Roland Ruiken

Medical advisor, Norway

Dr. Viktor Simunovic

Medical advisor, Croatia

To the medical advisory board