How Long Does Spedra Last? Onset, Duration and How Long It Stays in Your System
- States the licensed onset timing exactly as the regulator words it, with the trial figure behind it
- Explains why no duration or half life figure exists in regulator sources, instead of inventing one
- Answers the twice in one day question with the licensed maximum frequency, not a guess
- States plainly why avanafil must never be combined with another erectile dysfunction medicine
Spedra is licensed to be taken approximately 15 to 30 minutes before sexual activity. On how long it lasts, there is no published duration of action or half-life figure in the NICE or MHRA sources this page uses, so this page gives neither.
That is an unusual answer for a page with this title, and it is the honest one. Most pages answering "how long does Spedra last" quote a number, and none of those numbers comes from a UK regulator source. Several belong to a different medicine entirely.
What can be said is more useful than a made up figure. The licensed timing is documented, there is a published figure for attempts made within 15 minutes of dosing, the maximum frequency is defined, food delays onset, and a regulator statement explains why the duration was never pinned down.
One thing before the timings. Spedra must never be taken with another erectile dysfunction medication or other erectile dysfunction treatments. NICE names other treatments for erectile dysfunction among the special warnings and precautions for avanafil. Spedra should not be taken with another erectile dysfunction medicine. The UK product information states that the safety and efficacy of combining avanafil with other PDE5 inhibitors or other erectile dysfunction treatments have not been studied, and patients should be advised not to use them together.
Key things to know
- NICE states that avanafil "should be taken 25-30 minutes before" it is needed. The current UK product information gives approximately 15 to 30 minutes before sexual activity.
- No duration of action figure for avanafil appears in the NICE or MHRA sources used here. Neither does half life.
- A licence variation was submitted to examine the effect approximately 15 minutes after dosing. That was pending, and it is not a licence change.
- In the trials, 300 attempts were made within 15 minutes of dosing, and 64 to 71% of those were reported successful.
- NICE notes the time from taking the tablet to the start of activity was not well defined during the studies. That is why no duration figure exists.
- The maximum recommended dosing frequency is once daily. Twice in one day is outside the licence.
- Food may delay the onset, per NICE.
- Do not take it with another erectile dysfunction medicine.
How long does Spedra take to work?
NICE states avanafil "should be taken 25-30 minutes before" it is needed. That is the licensed timing, meaning the point the licence is written around rather than an average measured in a laboratory.
How long does Spedra take to work, how long before Spedra kicks in and Spedra onset time are all answered by that same figure. So is how long does avanafil take to work, because avanafil is the active ingredient in Spedra and the two names describe one medicine.
The 15 minute figure, and what it does and does not show
NICE reports that 300 attempts were made within 15 minutes of dosing, and that 64 to 71% of those attempts were reported to be successful.
That is the only quantified onset figure published for avanafil, and it is worth reading precisely.
It shows that a substantial proportion of attempts made within 15 minutes of dosing were reported as successful. It does not establish 15 minutes as a licensed onset time or mean it will work in 15 minutes for you.
NICE also records that a licence variation was submitted to examine the effect approximately 15 minutes after dosing. That was pending at the time of review, not an approved change, so 25 to 30 minutes remains the licensed position. The earlier figure is evidence rather than instruction.
How long does Spedra last?
No duration of action figure for avanafil is published in the NICE or MHRA sources this page uses. This page will not invent one, and you should be sceptical of any page that states one without a source.
How long does Spedra last, how long is Spedra effective, how long does Spedra keep working, Spedra duration of action, how long does Spedra wear off and how long does avanafil last are all the same question, and they all meet the same gap.
Why the duration was never pinned down
NICE gives the reason directly. It notes that the time from taking the medicine to the start of activity was not well defined during the studies.
That single sentence explains the whole gap. If the trials did not control when people took the tablet relative to when they needed it, the studies could not measure how long the effect lasted. They measured whether attempts succeeded, not how many hours of coverage each dose provided.
This is a limitation of the evidence, not a criticism of the medicine, and it is the sort of thing almost no page tells you, because quoting a number is easier.
Avanafil is a PDE5 inhibitor that supports increased blood flow to the penis during sexual stimulation. Food, alcohol and other medicines can affect how treatment works or its tolerability, but these factors do not provide a reliable way to calculate a duration of action.
It is also important to note that combining Spedra tablets with other ED medication or other ED treatments is contraindicated.
Spedra should not be combined with another erectile dysfunction medicine. The safety and efficacy of combining avanafil with other PDE5 inhibitors or other erectile dysfunction treatments have not been studied, so patients are advised not to use them together.
Furthermore, certain substances like grapefruit juice may interact with Spedra's active ingredient avanafil by increasing its concentration in the bloodstream, potentially intensifying side effects. Similarly, taking Spedra with a large meal, especially high in fat, can delay the onset of action by slowing absorption. Spedra can be taken with or without food, although a high-fat meal can delay the onset of activity. The licensed timing is approximately 15 to 30 minutes before sexual activity.
Clinical trials have demonstrated statistically significant improvements in erectile-function measures with avanafil. Individual responses vary, so results from clinical studies should not be treated as predictions for an individual.
Patients should always discuss their full medical history and current medications with their healthcare provider before starting Spedra or any other prescription medication for erectile dysfunction.
In summary, the absence of a precise duration figure for Spedra reflects the complex interplay of physiological, pharmacological, and lifestyle factors affecting its efficacy and duration. This complexity underscores the importance of personalized medical advice and careful adherence to prescribing guidelines to achieve and maintain an erection safely and effectively.
What you can rely on instead
- The licensed timing. 25 to 30 minutes beforehand is documented.
- The maximum frequency. Once daily, which puts an outer bound on how the medicine is used.
- The patient information leaflet in your pack. This is the authoritative document for the specific medicine you have been supplied, and it is written for the product you are actually holding.
- Your own experience, discussed with a prescriber. Duration is one of the things worth reporting at a review, because it is a legitimate reason to consider a different option.
If duration is your main consideration, say so at the consultation. One medicine in this class differs from the rest substantially on that measure, and a prescriber can tell you whether it suits your history.
Spedra half life and how long it stays in your system
No half life for avanafil is published in the NICE or MHRA sources used here, and no figure for how long it stays in the body appears either.
Spedra half life and how long does Spedra stay in your system are the two most confidently answered questions on competing pages and the two least supported by regulator sources.
Why copied half life figures are unreliable
A half life belongs to one molecule. It describes how long that specific substance takes to fall to half its concentration in the body. It does not transfer to a different substance, even one in the same class doing the same job.
Avanafil, sildenafil, tadalafil and vardenafil are four different molecules. A half life quoted for one of them tells you nothing reliable about the others. A substantial number of pages comparing these medicines have copied one medicine's figures onto another, and the result reads authoritative while being wrong.
Spedra avanafil and how Spedra work
Spedra contains avanafil, a PDE-5 inhibitor that works by increasing blood flow to the penile area when the user is appropriately stimulated. This mechanism requires sexual stimulation; the medication alone does not cause an erection. Spedra is taken approximately 15 to 30 minutes before sexual activity.
Effects of Spedra and different doses
Spedra is available in 50mg, 100mg and 200mg strengths. The appropriate strength depends on individual assessment, and adverse-event rates in clinical studies did not follow a simple dose-related pattern.
Increasing the dose may improve effectiveness but can also have side effects such as headaches, flushing, and heart palpitations. A lower dose might be prescribed to reduce side effects. The right treatment and dose depend on individual assessment by a healthcare professional.
Important safety considerations: taking nitrates and other medicines
Spedra must never be taken with nitrates or other erectile dysfunction medications, including over the counter medicines and herbal remedies, due to the risk of a sudden decrease in blood pressure. The combination can cause a potentially dangerous fall in blood pressure. Tell your prescriber about all medicines you take so that potential interactions can be assessed.
Food, alcohol, and onset of Spedra
Taking Spedra with a high-fat meal can delay the onset of activity. No specific delay figure is given in the NICE source used here. Alcohol can increase the risk of dizziness and low blood pressure when taken with avanafil.
Monitoring and tests
Before starting Spedra, your prescriber will assess your medical history, cardiovascular health and current medicines to determine whether treatment is appropriate. If you experience any following serious side effects such as chest pain, sudden decrease in vision or hearing, or an erection lasting longer than four hours, seek immediate medical attention.
General safety and recommendations
Spedra is generally safe when taken as prescribed and not combined with contraindicated medications. It should not be taken more than once in 24 hours. If the medication does not appear to work or the effects wear off sooner than expected, consult your prescriber rather than taking additional doses.
Alternative options
If Spedra is unsuitable or ineffective, other PDE-5 inhibitors or treatments may be considered. Some patients explore herbal remedies or over the counter medicines, but these lack the proven efficacy and safety profile of prescription medications like Spedra and should be used cautiously under medical advice.
What "stays in your system" actually means
Two different things get confused here. How long the medicine is detectable is a pharmacokinetic question with no published answer in these sources. How long the medicine has an effect is a different question, with no published answer either.
Neither is a basis for calculating a safe gap before taking another erectile dysfunction medicine. Do not combine Spedra with another erectile dysfunction treatment; if you want to change treatment, speak to your prescriber.
Does food delay how long Spedra takes to work?
Yes. NICE states that "if it is taken with food, the onset of activity may be delayed."
That is a short statement and it carries more practical weight than most of the timing detail on this page.
No specific delay figure is published, so this page does not state one. What NICE says is that onset may be delayed, not by how long.
A substantial meal is a larger variable than the difference between strengths. People often assume a higher strength will overcome a heavy meal, and the published evidence supports neither the assumption nor a way to plan around it.
Alcohol is a separate issue from food. NICE lists it among the special warnings for avanafil, because both lower blood pressure. Alcohol can also impair erectile function, so drinking may make it harder to achieve or maintain an erection even when using treatment.
Timing after eating is worth raising at a consultation, because it is one of the more common reasons a medicine appears not to work.
Spedra: how long between doses, and can you take it twice in one day?
No. NICE states that "the maximum recommended dosing frequency is once daily." Taking Spedra twice in one day is outside the licence at any strength.
Can you take Spedra twice in one day and Spedra how long between doses are the same question, and the answer does not change with the strength involved. Once daily is the maximum for 50mg, 100mg and 200mg alike.
That covers three situations people ask about, and the answer is the same in all three.
The first tablet did not appear to work. Do not take another. Taking a second raises the risk without a matching rise in effect, and the reason it did not work is worth investigating.
Timing, food, alcohol and other factors can affect how treatment works, so the reason it did not work as expected is worth discussing with your prescriber rather than simply taking another dose.
The effect wore off sooner than expected. A consultation, not a second tablet.
You want to cover a longer period. Covering a longer period by taking more is not how this medicine works, and one medicine in this class is licensed in a format that addresses that need directly.
Never take an extra tablet to make up for one that did not appear to work. That is the clearest guardrail on this page, and it applies to every medicine in this class.
Why Spedra must never be taken with another ED medicine
Do not take Spedra with another erectile dysfunction medicine. NICE includes other erectile dysfunction treatments among the special warnings and precautions for avanafil. The UK product information states that the safety and efficacy of combining avanafil with other PDE5 inhibitors or other erectile dysfunction treatments have not been studied, and patients should be advised not to use them together.
The absence of a published half-life does not provide a way to calculate a safe interval between treatments. If you want to change from one erectile dysfunction medicine to another, speak to your prescriber about the appropriate timing.
This is particularly important at 200mg because 200mg is the maximum recommended single dose of avanafil.
How long does Spedra 200mg last compared with 100mg?
No separate duration is published for any avanafil strength. How long does Spedra 200mg last and how long does Spedra 100mg last have the same answer, which is that no figure exists in these sources.
The strengths differ in how much avanafil is in the tablet, not in the timing the licence is written around. NICE gives one licensed timing for avanafil rather than one per strength, and one maximum frequency rather than one per strength.
| Point | 50mg | 100mg | 200mg |
|---|---|---|---|
| Licensed timing | 25 to 30 minutes beforehand | Same | Same |
| Maximum frequency | Once daily | Once daily | Once daily |
| Published duration of action | None | None | None |
| Published half life | None | None | None |
A higher strength is not a longer strength. It is more of the same molecule doing the same thing. Increasing the strength should not be viewed as a way to obtain longer coverage. The trial data showed a difference in erectile-function score, not a demonstrated difference in duration.
Strength is a prescribing decision. Treatment suitability depends on an individual clinical assessment, and your prescriber will determine the appropriate treatment and strength.
Spedra duration vs Viagra and Spedra duration vs Cialis
No head to head trials compare the duration of these medicines, and NICE states directly that "it is not known how avanafil compares to other PDE5 inhibitors." What follows is what each regulator source publishes separately, which is not the same as a comparison.
| Active ingredient | What the regulator publishes on timing |
|---|---|
| Avanafil | Licensed to be taken 25 to 30 minutes beforehand. No duration of action figure published |
| Sildenafil | MHRA documentation states it "normally takes between 30 to 60 minutes to work", and that 50mg "was effective at various times post-dose from less than 1 hour to up to 4 hours" |
| Tadalafil | Also licensed in a lower strength daily format, which removes the timing window from the decision |
Read the first two rows carefully, because they are not the same kind of statement. The avanafil figure is a licensed timing. The sildenafil figure describes how long it normally takes, plus an observation of when the effect was seen in a study. Comparing them directly compares a licence instruction with a study observation.
Spedra duration vs Viagra therefore has no clean answer. One has a published observation window, the other does not, and neither has been trialled against the other.
Spedra duration vs Cialis is the more meaningful comparison, and the difference is format rather than hours. Tadalafil is also licensed in a lower-strength daily format, which removes the need to time each dose around anticipated sexual activity.
That removes the planning window entirely rather than extending it, which is a different kind of answer to the duration question.
Whether that suits you is a preference and a clinical question, not a ranking. No medicine in this class can be described as better than another as a general statement.
What actually changes how long Spedra seems to work
More of the variation people notice comes from context than from the tablet, and most of it is addressable.
- When you took it. The licence is written in around 25 to 30 minutes. Taking it much earlier or later than that changes what you experience.
- What you ate. NICE states food may delay onset. A substantial meal is one of the most common explanations for a medicine appearing not to work.
- Alcohol. It can impair erectile function and increase the risk of dizziness and low blood pressure when taken with avanafil.
- Your underlying health and the cause of your erectile difficulties. Different study populations showed different average results, so trial findings should not be used to predict an individual's response.
- Your other medicines. Several interact, and some rule the whole class out.
- Expectation and other non-treatment factors can also influence outcomes in clinical trials, as shown by improvement in the placebo group.
None of those is fixed by taking more or by taking it more often. Each has a different answer, and a prescriber can work through them with you against your actual history.
To discuss whether a treatment suits you, you can view the erectile dysfunction treatments available and complete an online consultation with UK registered prescribers, or see the Spedra tablets product page for the licensed strengths. EveryDayMeds is a GPhC registered pharmacy, and clinical assessment happens before supply.
Red flags: when timing stops being the question
Seek urgent medical attention if any of the following happen after taking avanafil:
- An erection lasting more than four hours, known as priapism, whether or not it is painful. This is the one timing related emergency, and four hours is the threshold
- Sudden loss of vision in one or both eyes
- Sudden loss of hearing, with or without ringing or dizziness
- Chest pain, especially during or shortly after exertion
- Fainting, or dizziness severe enough to make you fall
- Signs of an allergic reaction, including swelling of the face, lips or throat, or difficulty breathing
Do not take a nitrate for chest pain if you have taken avanafil. Tell the medical team what you have taken and when. Do not try to calculate a safe interval yourself from the absence of a published half-life. Tell the medical team what you have taken and when.
Speak to your prescriber, if the effect consistently wears off sooner than you expected, if the medicine does not work as expected, or if timing is making treatment difficult. Do not resolve any of those by taking more, taking it twice in a day, or adding something else.
Medical Disclaimer
This article is general information and does not replace personalised medical advice. It gives no dosing instructions and should not be used to self diagnose, self prescribe, self medicate, or to start, stop or change any medicine.
Avanafil is a prescription only medicine. Suitability depends on an individual clinical assessment by an appropriately qualified prescriber, who will consider your medical history, current medicines and cardiovascular health. This medicine should only be used under the supervision of an appropriately qualified prescriber. Results vary between individuals.
This page deliberately publishes no duration of action and no half life for avanafil, because neither appears in the regulatory sources it uses. The absence of a figure here is not an oversight, and it should not be filled in from another medicine or another website. The patient information leaflet supplied with your medicine is the authoritative document.
Timing information describes what the licence is written around, not an instruction on when or how to take anything. Both the strength and the amount supplied are prescribing decisions. Your prescriber will determine the appropriate treatment.
Trial figures quoted here describe results across defined study populations and are not predictions for any individual.
Never take more than the prescribed amount of any medicine, never take a second dose in the same day, never take an extra tablet because one did not appear to work, and do not combine Spedra with another erectile dysfunction medicine unless specifically advised by a healthcare professional.
If you experience chest pain, an erection lasting more than four hours, sudden vision loss or sudden hearing loss, seek urgent medical attention.
Frequently Asked Questions
How long does Spedra last?
How long does Spedra take to work?
What is the Spedra half life?
How long does Spedra stay in your system?
Can you take Spedra twice in one day?
How long between Spedra doses?
Does food delay how long Spedra takes to work?
How long does Spedra 200mg last compared with 100mg?
Spedra duration vs Viagra: which lasts longer?
Spedra duration vs Cialis: what is the difference?
Why do other websites give a duration figure for Spedra?
How long does avanafil take to work compared with Spedra?
Spedra 50mg Reviews: Why Most Do not Apply
Spedra 50mg Tablets: What to Know Before You Buy
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