Taking Avanafil First Time: What You Need to Know

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What Is Avanafil and How Does It Work?

Avanafil is a prescription medicine used to treat erectile dysfunction in adult men [6]. It belongs to a group of medicines called PDE5 inhibitors, which work by relaxing blood vessels in the penis, allowing increased blood flow when you are sexually aroused [1]. Unlike older ED treatments, avanafil has been designed to work more quickly, often taking effect within 15–30 minutes of taking a dose [11].

It is important to understand that avanafil does not cause an erection on its own—sexual stimulation is still needed for the medicine to work [6]. The medicine helps your body respond naturally to arousal by making it easier to achieve and maintain an erection suitable for sexual activity. Avanafil is available in three strengths: 50 mg, 100 mg, and 200 mg tablets, allowing your prescriber to tailor the dose to your individual needs [6].

In the UK, avanafil is sold under the brand name Spedra and is available only on prescription after a clinical assessment by a qualified healthcare professional [11]. At Cured Pharmacy, our UK-registered prescribers review your online consultation to ensure avanafil is safe and suitable for you before any treatment is supplied.

Recommended Avanafil Dosage for First-Time Users

For most men using avanafil first time, the recommended starting dose is 100 mg, taken as needed approximately 15–30 minutes before sexual activity [6]. This middle-strength dose has been shown in clinical trials to be effective for many men while minimising the risk of side effects. You should not take more than one dose in any 24-hour period [6].

Depending on how well the 100 mg dose works for you and whether you experience any side effects, your prescriber may adjust your dose. The dose can be increased to 200 mg if the initial dose is not effective enough, or reduced to 50 mg if you experience side effects or have certain medical conditions [6]. Some men, particularly older adults or those taking other medicines, may be advised to start on the lower 50 mg dose as a precaution.

It is essential to follow your prescriber's instructions exactly. Never take more than the prescribed dose, and do not take avanafil more than once a day, even if the first dose did not produce the desired effect [6]. If you find that avanafil is not working well for you after several attempts, speak to your prescriber—they may suggest adjusting the dose, trying a different ED treatment, or investigating underlying causes of your erectile dysfunction.

Special Dosing Considerations

Certain health conditions and medicines can affect the dose of avanafil that is safe for you. If you have moderate liver or kidney problems, your prescriber will usually recommend a lower starting dose and may limit the maximum dose you can take [6]. Men taking medicines that affect how the body processes avanafil—particularly potent CYP3A4 inhibitors such as ritonavir, ketoconazole, or clarithromycin—should avoid avanafil or use it only under very close medical supervision, as these medicines can significantly increase avanafil levels in the blood [6].

If you are taking alpha-blockers for prostate problems or high blood pressure (such as tamsulosin or doxazosin), your prescriber will need to check that you are stable on that treatment before prescribing avanafil, and you will usually start on the lowest dose to reduce the risk of dizziness or low blood pressure [6]. Always declare all your current medicines, including over-the-counter products and herbal remedies, during your consultation.

How to Take Avanafil First Time: Timing and Preparation

One of the key advantages of avanafil is its fast onset of action. When taking avanafil first time, plan to take your tablet about 15–30 minutes before you anticipate sexual activity [6]. Swallow the tablet whole with a glass of water—you can take it with or without food, although a very heavy or high-fat meal may slow down how quickly it works [12].

Because avanafil works relatively quickly compared to other ED medicines, you have more flexibility in timing. However, it is still important to allow at least 15 minutes for the medicine to start working. Some men find it takes effect within 15 minutes, while for others it may take closer to 30 minutes [11]. Remember that sexual stimulation is necessary for avanafil to work—the tablet will not cause an automatic erection.

Avoid drinking large amounts of alcohol when taking avanafil, as alcohol can make it harder to get an erection and may increase the risk of side effects such as dizziness, headache, or low blood pressure [6]. A small amount of alcohol is unlikely to cause problems, but heavy drinking can reduce the effectiveness of the treatment and make side effects more likely. Grapefruit juice should also be avoided, as it can increase the levels of avanafil in your blood and raise the risk of side effects [6].

What you need to know

• The usual starting dose of avanafil is 100 mg, taken 15–30 minutes before sex
• Sexual stimulation is needed for avanafil to work; it does not cause automatic erections
• Never take avanafil with nitrates, nicorandil, or poppers—this can be dangerous
• It may take 2–3 attempts to assess how well avanafil works for you
• Prescription required after online consultation with a UK-registered prescriber

What to Expect When You Take Avanafil for the First Time

When you take avanafil first time, it is normal to feel a little uncertain about what will happen. Most men do not notice any immediate physical sensations after swallowing the tablet. The medicine works in the background, and you will only notice its effect when you become sexually aroused—at that point, you should find it easier to achieve and maintain an erection suitable for intercourse [6].

Some men find that avanafil works very well on the first attempt, while others may need to try it on two or three separate occasions before they get the best results [11]. This is completely normal. Factors such as anxiety, stress, tiredness, or the amount of food in your stomach can all affect how well the medicine works on any given occasion. If your first experience is not as successful as you hoped, do not be discouraged—give it another try on a different day.

It is also worth noting that avanafil does not increase sexual desire. If you are not feeling aroused or interested in sex, the medicine will not create an erection. The treatment works by enhancing your body's natural response to sexual stimulation, so relaxation, communication with your partner, and a comfortable environment can all help improve your experience. If you continue to have difficulties after several attempts, contact your prescriber to discuss whether a dose adjustment or a different treatment might be more suitable.

Common Side Effects on Your First Dose

Like all medicines, avanafil can cause side effects, although not everyone experiences them. The most common side effects when taking avanafil first time include headache, flushing (redness or warmth in the face, neck, or chest), nasal congestion, and back pain [6]. These side effects are usually mild and tend to improve as your body gets used to the medicine.

Less common side effects include dizziness, indigestion, nausea, and changes in vision such as blurred vision or increased sensitivity to light [6]. If you experience any side effects that are troublesome or persistent, speak to your pharmacist or prescriber. In rare cases, avanafil can cause more serious side effects such as a prolonged erection lasting more than four hours (priapism), sudden loss of vision, or sudden loss of hearing—if any of these occur, seek urgent medical help immediately [6].

Important Safety Information for First-Time Avanafil Users

Before taking avanafil first time, it is essential to ensure the medicine is safe for you. Avanafil must never be taken if you are using nitrate medicines for chest pain (such as glyceryl trinitrate spray, isosorbide mononitrate, or isosorbide dinitrate), nicorandil, riociguat, or recreational drugs known as 'poppers' (amyl or alkyl nitrites) [6]. The combination of avanafil with any of these substances can cause a dangerous drop in blood pressure that may be life-threatening.

Avanafil is also not suitable if you have recently had a heart attack or stroke, have unstable angina, severe heart failure, very low blood pressure, or certain inherited eye conditions [6]. Sexual activity itself carries some cardiovascular risk, so if your doctor has advised you to avoid sexual activity for health reasons, you should not take avanafil or any other ED treatment. Always be honest and thorough when completing your online consultation, as this information is vital for your safety.

If you develop chest pain during or after sexual activity, do not use nitrate medicines to relieve it—tell the healthcare professional treating you that you have taken avanafil [6]. If you experience sudden loss of vision in one or both eyes, stop taking avanafil and seek immediate medical advice, as this could be a sign of a serious condition called non-arteritic anterior ischaemic optic neuropathy (NAION) [6]. Similarly, sudden hearing loss or ringing in the ears requires prompt medical attention.

When to get urgent help

• Erection lasting more than 4 hours (priapism)—go to A&E immediately
• Sudden loss of vision in one or both eyes—stop taking avanafil and seek urgent medical help
• Chest pain during or after sex—do not take nitrates; tell medical staff you have taken avanafil
• Sudden hearing loss or ringing in the ears—seek medical advice promptly
• Severe allergic reaction (swelling of face, lips, or throat, difficulty breathing)—call 999

Call 999 or go to A&E in an emergency, or contact NHS 111 for urgent advice.

Comparing Avanafil with Other ED Treatments for First-Time Use

If you are considering avanafil first time, you may be wondering how it compares to other erectile dysfunction treatments available in the UK. The main alternatives are sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra), all of which are also PDE5 inhibitors but differ in how quickly they work and how long their effects last [1][2].

Avanafil's key advantage is its rapid onset of action—it can start working in as little as 15 minutes, making it the fastest-acting oral ED treatment currently available [11]. In comparison, sildenafil typically takes about an hour to work, vardenafil takes 25–60 minutes, and tadalafil takes at least 30 minutes [3][4][5]. This makes avanafil a good choice for men who value spontaneity and do not want to plan too far ahead.

However, avanafil's effects last for a shorter time than tadalafil. While tadalafil can remain effective for up to 36 hours, allowing for more flexibility over the weekend, avanafil's effects typically last for around 4–6 hours [4][6]. Sildenafil and vardenafil have similar durations of action to avanafil. The choice between these medicines often comes down to personal preference, lifestyle, and how your body responds to each treatment. Your prescriber can help you decide which option is most suitable for your needs, and it is perfectly acceptable to try different treatments to find the one that works best for you.

Cost Considerations

Avanafil (Spedra) tends to be more expensive than generic sildenafil or tadalafil, as it is a newer medicine and does not yet have a widely available generic version in the UK. At Cured Pharmacy, Spedra (avanafil) is available from £20.95, with a first-order discount bringing the price to £16.76 when you use the code Ednew. In comparison, generic sildenafil starts from as little as £0.45 (£0.36 with code Ednew), and generic tadalafil from £7.95 (£6.36 with code Ednew).

While cost is an important factor, it should be balanced against effectiveness, convenience, and personal preference. Some men find that the faster action and tolerability of avanafil make it worth the extra cost, while others prefer the longer duration of tadalafil or the lower price of sildenafil. All of these medicines require a prescription following an online consultation with a UK-registered prescriber at Cured Pharmacy.

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