How Long Does Viagra Last vs Spedra? | Cured Pharmacy

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How Long Does Viagra Last Compared to Spedra?

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How Long Does Viagra Last Compared to Spedra?

Published on: June 03, 2026

Understanding how long does Viagra last compared to Spedra is essential when choosing the right erectile dysfunction treatment for your lifestyle. Viagra (sildenafil) typically remains effective for 4-6 hours, whilst Spedra (avanafil) offers a faster onset—often within 15-30 minutes—and lasts approximately 4-5 hours [1][2]. At Cured Pharmacy, our UK-registered prescribers help you select the most suitable PDE5 inhibitor based on your individual needs, with sildenafil available from £0.45 following a free online consultation.

How Long Does Viagra (Sildenafil) Last in Your System?

Viagra contains sildenafil citrate, a phosphodiesterase type 5 (PDE5) inhibitor that enhances erectile function by increasing blood flow to the penis during sexual stimulation [1]. After taking a standard 50mg or 100mg dose, sildenafil typically begins working within 30-60 minutes, with peak plasma concentrations reached around 60 minutes post-dose [1].

The therapeutic effects of Viagra generally last between 4 and 6 hours, though this varies based on individual factors including age, metabolism, and whether the tablet is taken with food [1]. High-fat meals can delay absorption by up to an hour, reducing spontaneity. Sildenafil has a half-life of approximately 3-5 hours, meaning the medication is gradually eliminated from your system over this period [1].

It's important to note that Viagra does not produce an erection on its own—sexual stimulation is required for the medication to work effectively. The 4-6 hour window represents the period during which achieving and maintaining an erection is easier, not a continuous erection lasting that duration.

How Long Does Spedra (Avanafil) Last and Work?

Spedra contains avanafil, a newer-generation PDE5 inhibitor licensed in the UK that offers a significantly faster onset of action compared to older treatments [2]. Clinical trials demonstrate that avanafil can begin working in as little as 15-30 minutes, making it the fastest-acting oral erectile dysfunction treatment currently available [2].

The duration of Spedra's effectiveness is approximately 4-5 hours following a 100mg or 200mg dose, slightly shorter than Viagra but with the advantage of rapid onset [2]. This faster action allows for greater spontaneity, as patients don't need to plan sexual activity as far in advance. Avanafil's half-life is around 6-17 hours, though the therapeutic window for erectile function is concentrated in the first 4-5 hours [2].

In the pivotal Phase III trials, avanafil demonstrated statistically significant improvements in erectile function scores compared to placebo, with 57-84% of attempts resulting in successful intercourse depending on dose [2]. Like all PDE5 inhibitors, Spedra requires sexual arousal to be effective and does not increase libido independently.

Why Spedra Works Faster Than Viagra

Avanafil's molecular structure allows for more selective PDE5 inhibition and faster absorption through the gastrointestinal tract [2]. This selectivity also contributes to a potentially lower incidence of certain side effects, such as visual disturbances, which are occasionally reported with sildenafil due to its partial effect on PDE6 enzymes in the retina [1][2].

The rapid onset makes Spedra particularly suitable for patients who value spontaneity and prefer not to schedule sexual activity hours in advance. However, the medication still requires a prescription and clinical assessment by a UK prescriber to ensure suitability and safety.

Viagra vs Spedra: Duration and Onset Compared

When comparing how long Viagra lasts compared to Spedra, the key differences lie in onset time rather than overall duration. Viagra typically requires 30-60 minutes before becoming effective and lasts 4-6 hours, whilst Spedra can work within 15-30 minutes and remains active for 4-5 hours [1][2].

For patients who prefer to take their medication well in advance of sexual activity, Viagra's longer duration may offer a slight advantage. Conversely, those seeking maximum spontaneity often find Spedra's rapid onset more suitable for their lifestyle. Both medications are taken on-demand rather than daily, and neither should be used more than once in a 24-hour period.

Individual response varies considerably—some patients find sildenafil highly effective, whilst others respond better to avanafil. Factors including concurrent medications, underlying health conditions, and personal metabolism all influence which PDE5 inhibitor works best. At Cured Pharmacy, our UK prescribers assess your medical history to recommend the most appropriate treatment, with options including generic sildenafil or branded alternatives.

Treatment Active Ingredient Onset Time Duration Starting Price at Cured Pharmacy
Viagra / Sildenafil Sildenafil citrate 30-60 minutes 4-6 hours From £0.45
Spedra Avanafil 15-30 minutes 4-5 hours Not currently stocked
Cialis / Tadalafil Tadalafil 30-60 minutes Up to 36 hours From £9.99
Viagra Connect Sildenafil citrate 30-60 minutes 4-6 hours From £11.49

Which Erectile Dysfunction Treatment Lasts Longest?

Whilst Viagra and Spedra offer similar durations of 4-6 hours, tadalafil (the active ingredient in Cialis) provides the longest window of effectiveness among oral PDE5 inhibitors [3]. Tadalafil can remain active for up to 36 hours, earning it the nickname 'the weekend pill' [3].

Tadalafil's extended duration makes it ideal for patients who prefer not to time their medication around sexual activity. However, the longer half-life also means the medication stays in your system longer, which may be a consideration if you experience side effects. Tadalafil is available in both on-demand formulations (10mg and 20mg) and a daily low-dose option (2.5mg or 5mg) for continuous erectile support [3].

The choice between shorter-acting treatments like Viagra or Spedra and longer-acting tadalafil depends on your lifestyle, frequency of sexual activity, and personal preference. All three active ingredients—sildenafil, avanafil, and tadalafil—are available at Cured Pharmacy following a free online consultation with a UK prescriber, with sildenafil starting from £0.45.

Daily vs On-Demand Dosing

On-demand PDE5 inhibitors like Viagra and Spedra are taken 15-60 minutes before anticipated sexual activity, allowing for flexibility in timing. Daily tadalafil, taken at the same time each day regardless of sexual activity, maintains a steady level of medication in the bloodstream and can improve spontaneity further [3].

Your UK prescriber will discuss which dosing strategy aligns best with your sexual health goals, relationship dynamics, and medical background. All prescription erectile dysfunction treatments require clinical assessment to ensure they are safe and appropriate for you.

Factors That Affect How Long Viagra and Spedra Last

Several physiological and lifestyle factors influence the duration and effectiveness of both Viagra and Spedra. Age is a significant variable—older patients often metabolise medications more slowly, potentially extending duration but also increasing the likelihood of side effects [1]. Hepatic and renal function also affect drug clearance, and dose adjustments may be necessary for patients with liver or kidney impairment.

Alcohol consumption can reduce the effectiveness of PDE5 inhibitors and increase the risk of side effects such as dizziness and hypotension [1][2]. Whilst a small amount of alcohol is unlikely to cause problems, excessive drinking impairs erectile function independently and should be avoided when using these medications.

Food intake plays a notable role, particularly with sildenafil. High-fat meals delay gastric emptying and can postpone Viagra's onset by up to an hour, reducing spontaneity [1]. Spedra is less affected by food, making it a more reliable option if you prefer not to take medication on an empty stomach [2]. Other medications, particularly nitrates used for angina, are absolutely contraindicated with all PDE5 inhibitors due to the risk of severe hypotension [1][2][3].

Getting Viagra or Spedra from Cured Pharmacy

At Cured Pharmacy, accessing erectile dysfunction treatment is straightforward, discreet, and medically supervised. All patients begin with a free online consultation that takes under three minutes to complete. Our UK-registered prescribers review your medical history, current medications, and cardiovascular health to determine which PDE5 inhibitor is safest and most effective for you.

We stock a range of erectile dysfunction treatments including generic sildenafil from £0.45, branded Viagra Connect, and tadalafil options. Whilst Spedra (avanafil) is not currently stocked, our clinical team can recommend alternative fast-acting treatments or refer you to appropriate sources if avanafil is specifically indicated for your needs.

All medications are dispensed by our UK-registered pharmacy (GPhC 9012511) under the supervision of Superintendent Pharmacist Tarun Kumar (GPhC 2233073). We guarantee 100% discreet packaging, transparent upfront pricing, and genuine UK-licensed medicines. Delivery is prompt, and our clinical team is available by phone on (+44) 116 4646009 if you have questions about your treatment.

Why Choose Cured Pharmacy for Erectile Dysfunction Treatment

Cured Pharmacy combines the lowest prices in the UK with clinical excellence and convenience. Unlike high-street pharmacies, we display prices before you complete your consultation, so there are no surprises. Our online service eliminates the need for in-person GP appointments, saving you time whilst maintaining the same rigorous clinical standards.

Every prescription is reviewed by a qualified UK prescriber, ensuring your treatment is safe, legal, and tailored to your individual health profile. We never compromise on quality—all medications are sourced from licensed UK wholesalers and meet MHRA standards. Whether you're new to erectile dysfunction treatment or seeking better value for an existing prescription, Cured Pharmacy offers expert care at unbeatable prices.

Scientific References

  1. Eardley, I., et al. (2002). Pharmacokinetics of sildenafil after single oral doses in healthy male subjects: absolute bioavailability, food effects and dose proportionality. British Journal of Clinical Pharmacology, 53(Suppl 1), 5S–12S. https://doi.org/10.1046/j.0306-5251.2001.00027.x [accessed 13 August 2026]
  2. Goldstein, I., et al. (2012). Avanafil for the treatment of erectile dysfunction: a multicenter, randomized, double-blind study in men with diabetes mellitus. Mayo Clinic Proceedings, 87(9), 843–852. https://doi.org/10.1016/j.mayocp.2012.06.016 [accessed 13 August 2026]
  3. 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]
  4. 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

How long does Viagra last compared to Spedra?
Viagra typically lasts 4-6 hours, whilst Spedra lasts approximately 4-5 hours. The main difference is onset time—Spedra works in 15-30 minutes compared to Viagra's 30-60 minutes.
Which is faster, Viagra or Spedra?
Spedra (avanafil) is faster, often working within 15-30 minutes, making it the fastest-acting oral erectile dysfunction treatment available in the UK. Viagra requires 30-60 minutes to take effect.
Can I take Viagra or Spedra with food?
Spedra can be taken with or without food with minimal impact on effectiveness. Viagra's absorption is delayed by high-fat meals, so it's best taken on an empty stomach for faster onset.
How long does sildenafil stay in your system?
Sildenafil has a half-life of 3-5 hours, meaning it is gradually eliminated over this period. Therapeutic effects typically last 4-6 hours, though traces remain detectable for longer.
Is Spedra available at Cured Pharmacy?
Spedra (avanafil) is not currently stocked at Cured Pharmacy. We offer alternative fast-acting treatments including generic sildenafil from £0.45 and tadalafil from £0.45, both available after a free online consultation.
Which erectile dysfunction treatment lasts the longest?
Tadalafil (Cialis) lasts the longest, remaining effective for up to 36 hours. This makes it ideal for patients seeking extended spontaneity without needing to time medication around sexual activity.
Do I need a prescription for Viagra or Spedra in the UK?
Yes. Both Viagra and Spedra are prescription-only medications in the UK and require a clinical assessment by a UK-registered prescriber before they can be legally dispensed.
Can I drink alcohol with Viagra or Spedra?
Small amounts of alcohol are unlikely to cause problems, but excessive drinking can reduce effectiveness and increase side effects such as dizziness and low blood pressure. Moderation is advised.
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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