Spedra vs Viagra UK: Which ED Treatment Works Faster?

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Viagra Alternative: Comparing Spedra vs Viagra

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Spedra vs Viagra UK Comparison

Published on: June 03, 2026

When comparing spedra vs viagra uk comparison options, the key differences lie in onset time, duration, and side effect profiles. At Cured Pharmacy, our UK-registered clinical team helps patients choose between avanafil (Spedra's active ingredient) and sildenafil (Viagra's active ingredient) based on individual needs, with transparent pricing and discreet delivery.

How Spedra and Viagra Work for Erectile Dysfunction

Both Spedra (avanafil) and Viagra (sildenafil) belong to the PDE5 inhibitor class of medications licensed by the MHRA for treating erectile dysfunction [1]. They work by blocking the phosphodiesterase type 5 enzyme, which allows increased blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection suitable for intercourse.

The fundamental mechanism is identical across all PDE5 inhibitors, but the chemical structure of avanafil differs from sildenafil in ways that affect how quickly the medication is absorbed and metabolised [1]. This structural difference explains why Spedra typically works faster than Viagra, though both require sexual arousal to be effective.

Neither medication causes spontaneous erections or increases sexual desire. They simply facilitate the natural erectile response when sexual stimulation occurs, making them effective tools for men whose erectile dysfunction stems from physiological rather than purely psychological causes [2].

Spedra vs Viagra: Onset Time and Duration Compared

The most clinically significant difference between these medications is onset time. Clinical trials demonstrate that avanafil (Spedra) can work in as little as 15-30 minutes for many patients, whilst sildenafil (Viagra) typically requires 30-60 minutes to take effect [3]. This faster onset makes Spedra particularly suitable for men who prefer more spontaneity in their intimate relationships.

Duration of action also differs between the two treatments. Sildenafil remains effective for approximately 4-6 hours after administration, whilst avanafil typically lasts around 4-5 hours [3][4]. Both durations provide adequate time for sexual activity without requiring precise timing, though neither medication maintains a continuous erection throughout this period.

Food intake affects these medications differently. High-fat meals can significantly delay sildenafil absorption, potentially adding 30-60 minutes to onset time, whereas avanafil shows less interaction with food and can be taken with or without meals [3]. This makes Spedra more flexible for men who don't want to plan around mealtimes.

Clinical Trial Data on Effectiveness

In head-to-head comparative studies, both medications showed similar overall efficacy rates, with 60-75% of men reporting improved erectile function across various doses [3][4]. The choice between them often comes down to individual response patterns, timing preferences, and side effect tolerance rather than fundamental differences in effectiveness.

Side Effects: Spedra vs Viagra UK Profiles

Common side effects overlap considerably between avanafil and sildenafil, as both are PDE5 inhibitors. The most frequently reported adverse effects include headache (occurring in 10-15% of patients), facial flushing, nasal congestion, and back pain [1][3]. These effects are generally mild to moderate and resolve within a few hours as the medication clears the system.

Clinical data suggests avanafil may produce slightly fewer side effects than sildenafil at equivalent efficacy doses, particularly regarding visual disturbances [3]. Sildenafil can occasionally cause temporary blue-tinted vision or increased light sensitivity due to mild PDE6 inhibition in the retina, whilst avanafil shows greater selectivity for PDE5 over PDE6, potentially reducing this risk.

Both medications are contraindicated with nitrate medications used for angina, as the combination can cause dangerous blood pressure drops [1][2]. Men taking alpha-blockers for prostate issues require careful dose adjustment and monitoring. Your UK prescriber will review your complete medication list during consultation to ensure safe prescribing.

Who Should Avoid These Treatments

Men with severe cardiovascular disease, recent stroke or heart attack (within 6 months), uncontrolled blood pressure, or severe liver impairment should not use PDE5 inhibitors [2]. Your clinical assessment at Cured Pharmacy screens for these contraindications before any prescription is issued.

Feature Spedra (Avanafil) Viagra (Sildenafil)
Onset time 15-30 minutes 30-60 minutes
Duration of action 4-5 hours 4-6 hours
Food interaction Minimal - can take with meals Delayed by high-fat meals
Starting dose 100mg 50mg
Common side effects Headache, flushing, nasal congestion Headache, flushing, visual changes
Generic available in UK Yes (avanafil) Yes (sildenafil)
Price at Cured Pharmacy Competitive UK pricing From £0.45 per tablet
Best for Spontaneity, faster onset Cost-effectiveness, proven track record

Dosing and Administration: Avanafil vs Sildenafil

Sildenafil is available in 25mg, 50mg, and 100mg doses, with 50mg being the standard starting dose for most men [2]. The medication should be taken approximately one hour before anticipated sexual activity, though some men find it effective from 30 minutes onwards. Only one dose should be taken in any 24-hour period.

Avanafil (Spedra) comes in 50mg, 100mg, and 200mg strengths, with 100mg typically recommended as the initial dose [3]. It can be taken as little as 15-30 minutes before sexual activity, offering more spontaneity. Like sildenafil, avanafil should not be used more than once daily.

Dose adjustments may be necessary based on efficacy and tolerability. Some men find lower doses sufficient, whilst others require the maximum licensed dose to achieve satisfactory results. Your UK prescriber can adjust your prescription based on your experience with the initial dose, ensuring you receive the most appropriate strength for your individual response pattern.

Cost Comparison: Spedra Alternative to Viagra Pricing

Generic sildenafil represents the most cost-effective erectile dysfunction treatment available in the UK, with prices at Cured Pharmacy starting from £0.45 per tablet. This dramatic price reduction from branded Viagra occurred when the patent expired, making treatment accessible to significantly more men who previously found branded options prohibitively expensive.

Avanafil (generic Spedra) remains under patent protection in the UK, resulting in higher pricing across all pharmacies. However, for men who benefit from its faster onset time and potentially milder side effect profile, the additional cost may represent worthwhile value, particularly when purchased through competitive online pharmacies.

When evaluating cost-effectiveness, consider frequency of use and individual response. Men who use treatment infrequently may find either option affordable, whilst those requiring regular medication typically find generic sildenafil more sustainable long-term. Your prescriber can discuss both options during your free consultation to help identify the most suitable choice for your circumstances and budget.

Transparent Pricing at Cured Pharmacy

At Cured Pharmacy, all prices are displayed upfront before consultation, with no hidden fees or subscription requirements. Our superintendent pharmacist Tarun Kumar ensures competitive pricing on all licensed erectile dysfunction treatments, with genuine UK-sourced medications and discreet packaging included as standard.

Choosing Between Spedra and Viagra: Clinical Considerations

The decision between avanafil and sildenafil should be guided by your lifestyle, timing preferences, and individual response to treatment. Men who value spontaneity and want the fastest possible onset may prefer Spedra, whilst those seeking proven efficacy at the lowest cost typically choose generic sildenafil [3][4].

Your medical history plays a crucial role in treatment selection. Men with certain cardiovascular conditions, those taking multiple medications, or individuals with hepatic or renal impairment may find one option more suitable than the other based on drug interactions and metabolism pathways [2]. The UK prescriber conducting your assessment will consider these factors when recommending treatment.

Many men try both medications at different times to compare personal response, as individual variation in absorption, metabolism, and side effect tolerance can make one treatment clearly superior for a particular patient despite similar clinical trial outcomes [4]. Your initial prescription isn't a permanent commitment, and adjustments can be made based on your experience.

At Cured Pharmacy, our clinical team provides ongoing support after your initial prescription. If your first treatment choice doesn't meet expectations, you can request a medication review to discuss alternatives, dose adjustments, or complementary approaches to managing erectile dysfunction effectively.

Scientific References

  1. Eardley, I., Donatucci, C., Corbin, J., El-Meliegy, A., Hatzimouratidis, K., McVary, K., Munarriz, R., & Lee, S. W. (2010). Pharmacotherapy for erectile dysfunction. The Journal of Sexual Medicine, 7(1 Pt 2), 524-540. https://doi.org/10.1111/j.1743-6109.2009.01627.x [accessed 13 August 2026]
  2. 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]
  3. Goldstein, I., McCullough, A. R., Jones, L. A., Hellstrom, W. J., Bowden, C. H., Didonato, K., & Kulkarni, M. (2012). A randomized, double-blind, placebo-controlled evaluation of the safety and efficacy of avanafil in subjects with erectile dysfunction. The Journal of Sexual Medicine, 9(4), 1122-1133. https://doi.org/10.1111/j.1743-6109.2011.02629.x [accessed 13 August 2026]
  4. Yuan, J., Zhang, R., Yang, Z., Lee, J., Liu, Y., Tian, J., Qin, X., Ren, Z., Ding, H., Wang, Q., & Yang, J. (2013). Comparative effectiveness and safety of oral phosphodiesterase type 5 inhibitors for erectile dysfunction: a systematic review and network meta-analysis. European Urology, 63(5), 902-912. https://doi.org/10.1016/j.eururo.2013.01.012 [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.

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Faq

Is Spedra better than Viagra for erectile dysfunction?
Neither is universally better - Spedra works faster (15-30 minutes vs 30-60 minutes) and may cause fewer visual side effects, whilst Viagra offers proven long-term efficacy at significantly lower cost. The best choice depends on your priorities regarding onset time, budget, and individual response.
Can I switch from Viagra to Spedra?
Yes, you can switch between PDE5 inhibitors subject to prescriber approval. Many men try different options to find their preferred treatment. Request a medication review through Cured Pharmacy if you'd like to discuss switching from sildenafil to avanafil.
How much faster does Spedra work compared to Viagra?
Clinical trials show avanafil (Spedra) can work in 15-30 minutes for many patients, whilst sildenafil (Viagra) typically requires 30-60 minutes. This 15-30 minute difference offers greater spontaneity for men who prefer not to plan intimate activity an hour in advance.
Does Spedra have fewer side effects than Viagra?
Spedra may produce slightly fewer side effects, particularly visual disturbances, due to greater selectivity for PDE5 over PDE6 enzymes. However, both medications share common side effects including headache, flushing, and nasal congestion, which are generally mild and temporary.
Can I take Spedra and Viagra together?
No, you should never combine PDE5 inhibitors as this significantly increases the risk of serious side effects including dangerous blood pressure drops. Only one erectile dysfunction medication should be taken in any 24-hour period.
Which is cheaper: Spedra or Viagra in the UK?
Generic sildenafil is substantially cheaper, starting from £0.45 at Cured Pharmacy, whilst avanafil remains more expensive as a newer medication. For men requiring regular treatment, generic sildenafil typically offers better long-term value.
Do I need a prescription for Spedra or Viagra in the UK?
Yes, both avanafil and sildenafil are prescription-only medications in the UK and require clinical assessment by a UK-registered prescriber. Cured Pharmacy offers a free online consultation that takes under 3 minutes to complete.
Can I take Spedra with food unlike Viagra?
Yes, avanafil shows minimal food interaction and can be taken with or without meals, whilst high-fat foods can significantly delay sildenafil absorption. This makes Spedra more flexible for men who don't want to time medication around eating.
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


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