Spedra 300 mg, 25mg, 150mg, and 400mg: Do These Strengths Exist?

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In the UK, Spedra (avanafil) is available in 50 mg, 100 mg and 200 mg strengths. There are no licensed 25 mg, 150 mg, 300 mg or 400 mg Spedra strengths. The maximum recommended dose is 200 mg once daily.

For adults in the UK looking for clear information about Spedra strengths, whether you are considering treatment for erectile dysfunction or have already been prescribed it, the key point is simple: 200mg is the maximum licensed dose, and anything above that falls outside the genuine, safety-assessed product range. That makes Spedra 300 mg a real safety concern, especially when unverified sellers present unlicensed strengths as if they were normal.

This page explains which Spedra strengths are genuine, why 300mg does not exist as a licensed option, what risks come with offers from unregulated sources, and what to do if your current prescribed dose is not working well enough. If 200mg is not giving you the result you want, the safest next step is to speak to your prescriber, not to buy an unverified higher dose.

Why This Distinction Actually Matters for Side Effects

This is not just a technical point about product listings. A medicine's licensed strengths exist because each one has been through a specific process of clinical testing to establish how it performs and what's safe at that particular dose. A strength that has not been through that process, whether that is an invented 300mg tablet or a genuine medicine used well beyond its assessed range, is a meaningfully different proposition to a licensed 50mg, 100mg or 200mg tablet, even if it looks similar or is marketed with confident, reassuring language that gives no outward indication anything is amiss.

What Different Doses and Strengths Does Spedra Actually Come In?

Spedra is licensed in the UK at three specific strengths: 50mg, 100mg and 200mg. These are the only genuine options, and any product claiming to be a different strength, whether lower like 25mg, in between like 150mg, or higher like 300mg or 400mg, is not a real, licensed version of this medicine, regardless of how it is presented or where you have encountered it.

Why You Might Have Seen These Other Numbers

There are a few genuine reasons these figures turn up in searches, and understanding them helps make sense of the confusion.

Confusion With Other Erectile Dysfunction Medications and PDE5 Inhibitors

Sildenafil, a different medicine in the same class, does have a 25mg strength, alongside 50mg and 100mg. It is an easy mix-up to make, searching for a lower Spedra dose and landing on sildenafil's strength range instead, since the two medicines are often discussed together and work through the same general mechanism. This kind of cross-medicine confusion is common and understandable, particularly when the medicines are compared side by side in general treatment discussions.

Unverified or Counterfeit Sellers

Some unregulated sellers advertise medicines at strengths that do not genuinely exist, sometimes as a way to make a product seem more powerful or more tailored than the real, licensed options. Seeing "Spedra 300mg" or "Spedra 400mg" offered somewhere is not a sign of a more potent legitimate option, it is a signal that the seller is not operating within the genuine, regulated range of this medicine, and that everything else on that site is worth treating with the same scepticism.

Assuming a Pattern That does not Apply

It is a reasonable assumption to make that if 50mg, 100mg and 200mg exist, a 150mg or 300mg might too, following the same kind of doubling pattern. This assumption does not hold here. The three licensed strengths were established through the clinical trial and licensing process for this specific medicine, not through a simple mathematical progression that extends indefinitely, and there is no reason to expect a medicine's dose range to follow a tidy numerical sequence just because part of it happens to look that way.

Spedra 25mg Specifically: Active Ingredient and Details

A 25mg strength does not exist for Spedra. Unlike sildenafil, which has a 25mg option as a lower starting point, avanafil's lowest licensed strength is 50mg. If you are looking for a lower dose than 50mg specifically, that is worth discussing directly with your prescriber, since the options are either starting at the genuine 50mg strength or considering a different medicine in the same class that does offer a lower starting point. Neither path involves an invented 25mg version of this particular medicine, and both are genuinely safer routes to explore than an unverified product claiming to fill that gap.

Spedra 150mg Specifically

There's no 150mg strength either. The three licensed doses go directly from 50mg to 100mg to 200mg, with no intermediate strength available.If 100 mg is not providing an adequate response, discuss this with your prescriber. They can decide whether 200 mg or another treatment approach is appropriate for you.This gap between 100mg and 200mg is a genuine feature of how the medicine is licensed, not an oversight or something you are missing.

Spedra 300mg and 400mg Specifically

Neither 300 mg nor 400 mg is a licensed Spedra strength, and both exceed the recommended maximum dose of 200 mg. They should not be used as higher-dose alternatives.

A product claiming to be Spedra at 300mg or 400mg is not a stronger, more effective version, it is an unverified product that has not gone through the same safety assessment as the genuine strengths, and taking it carries real risk rather than simply a bigger effect. There is a natural assumption that a higher number on a label means a stronger, more reliable result, but that logic does not hold once you are outside the range that has actually been properly tested.

Why 200mg Is the Maximum, Not a Starting Point to Exceed

Spedra 200mg represents the highest strength that has been through the clinical trial and licensing process for this medicine, and taking Spedra never means exceeding one tablet in 24 hours, establishing both how well it works and what is safe at that level. This is not an arbitrary cut-off, it reflects the point at which the balance between effect and safety has actually been properly assessed. Going beyond it does not mean a proportionally bigger effect, since the relationship between dose and effect is not a straight line that keeps climbing indefinitely, and it does mean moving into territory that has not been safety-tested at all for this medicine. This is a genuinely important distinction from simply assuming "more must be better," which does not hold true for how this class of medicine actually works.

Is It Ever Safe to Take More Than 200mg?

No. Do not take more than the recommended maximum dose of 200 mg in 24 hours. If 200 mg is not effective or causes side effects, speak to your prescriber about other treatment options.

If you have Seen "Spedra 300mg" or "400mg" for Sale

Treat this as a clear red flag rather than a genuine option worth considering. A legitimate, GPhC-registered pharmacy will only ever offer the three real licensed strengths, and won't present a higher, unlicensed dose as a product to choose from. Other signs worth watching for on the same site include a lack of any genuine clinical assessment before purchase, unrealistically low prices, no verifiable street address or contact details, and payment requested only through unusual or untraceable methods. Any one of these, alongside a fabricated strength, is reason enough to walk away rather than proceed, and a fabricated strength on its own is already sufficient reason to be cautious about everything else the site is offering too.

What to Do If 200mg is not Working for You

This is a genuinely common situation, and there are legitimate next steps that do not involve searching for a higher, unverified dose.

If 200 mg is not providing an adequate response, your prescriber can review how and when you take it, whether sexual stimulation is present, whether food or alcohol may be affecting the response, and whether another treatment would be more appropriate.

Drinking alcohol can also reduce effectiveness, lower blood pressure, and increase dizziness. They may also review whether this is the right treatment for you, since it usually lasts around 4-5 hours, response varies between individuals, and it is effective for approximately 58% of men.

From there, options include a different PDE5 inhibitor, since individual response varies between medicines in this class, or a non-drug approach such as a vacuum erection device, particularly where the underlying cause suggests a tablet alone may not be the most effective route. None of these routes involve exceeding the licensed dose of any single medicine, since a genuinely different approach is always the safer path forward compared with simply taking more of the same one.

How to Double-Check a Strength Before You Trust It

If you are ever unsure whether a specific figure is a genuine Spedra strength, the quickest check is comparing it against the three confirmed options in this guide, 50mg, 100mg and 200mg, rather than assuming a listing is accurate simply because it looks professionally presented. A GPhC-registered pharmacy's own product information is the most reliable place to confirm this, since it will only ever list the genuine licensed strengths rather than anything invented or exaggerated. If a site presents an unfamiliar number confidently and without any apparent inconsistency, that confidence alone is not evidence of accuracy, and it is worth cross-checking independently rather than taking the claim at face value, particularly before entering any payment or personal details.

Symptom Watch: If You have Taken More Than Prescribed

If you have mistakenly taken more than your prescribed dose, or taken a product you are now unsure about, it is worth being aware of the signs that need urgent attention. An erection lasting more than 4 hours, chest pain, severe dizziness, fainting, blurred vision, or sudden loss of vision in one or both eyes all require urgent medical treatment, so contact a doctor immediately or seek emergency care. Spedra must not be taken with nitrate medicines because of the risk of severe low blood pressure. This applies regardless of whether the issue came from taking too much of a genuine medicine or from an unverified product of uncertain content. There is no need to feel embarrassed about seeking help in this situation, emergency staff are focused on treating the symptom safely, not on how it came about.

Comparing Spedra's Real Strengths to Sildenafil's

Part of the confusion around Spedra's strengths comes from how differently sildenafil's dose range is structured. Sildenafil is available at 25mg, 50mg and 100mg, a genuinely different set of numbers to Spedra's 50mg, 100mg and 200mg. Neither range is more "correct" than the other, they simply reflect the separate licensing and trial processes each medicine went through. Knowing this can help make sense of why a search for one medicine's dose sometimes surfaces information that actually belongs to the other, particularly since both medicines are often discussed together as options within the same broader treatment class.

Medical Disclaimer

This page is for general information only and is not a substitute for a one-to-one clinical assessment. It does not cover every possible individual circumstance and should not be used to self-diagnose or to start, stop or change any medication. If you experience an erection lasting more than 4 hours, this is a medical emergency: seek immediate care at A&E or call 999.