Avanafil vs Sildenafil: How the Newer Fast-Acting ED Tablet Compares

Avanafil and sildenafil are both PDE5 inhibitors used to treat erectile dysfunction (ED). Sildenafil is the original, most recognised option, while avanafil is a newer member of the family that is often valued for how quickly it begins to work. Understanding the practical differences can help you have a more informed conversation with your doctor or pharmacist.

The shared mechanism

Both medicines work the same way: they block the PDE5 enzyme, allowing the blood vessels in the penis to relax so that more blood can flow in during sexual arousal. Neither produces an erection on its own — sexual stimulation is essential for either to work. You can learn more about the condition in our erectile dysfunction explained overview.

Speed of onset

The most talked-about difference is timing.

• Avanafil is designed to act quickly, often within around 15 to 30 minutes, which appeals to people who want less of a wait before intimacy.
• Sildenafil typically takes around 30 to 60 minutes to take effect. A heavy or fatty meal can slow it down further. See our Sildenafil guide for more.

Duration

Both tablets are relatively short-acting compared with tadalafil. Their effect generally lasts a few hours, making them "as-needed" options taken ahead of planned activity rather than continuous treatments. Neither should be taken more than once in 24 hours unless a doctor advises otherwise.

Side effects and tolerability

Because they share a mechanism, both can cause similar side effects:

• Headache
• Facial flushing
• Nasal congestion
• Indigestion

Some people report that the newer molecule feels a little gentler on side effects such as visual changes, but individual responses vary widely. The patient information leaflet is the authoritative source for each product.

Which might suit you?

There is no universal winner. Avanafil's quicker onset can suit people who prefer spontaneity, while sildenafil has a long track record and is very widely available. Factors that matter include:

• How much you value a fast onset.
• How your body tolerates each option.
• Other medicines and health conditions you have.

For a broader look at the whole class, see our erectile dysfunction range.

Safety essentials

• Never combine avanafil or sildenafil with nitrates (for chest pain) or with poppers. This can cause a sudden, dangerous fall in blood pressure.
• Be cautious and seek advice if you take alpha-blockers or other blood-pressure medicines.
• An erection lasting longer than four hours is an emergency — seek urgent medical care.
• Stop and get help if you have chest pain, fainting, or sudden changes in vision or hearing.

Summary

Avanafil and sildenafil are close relatives that improve blood flow during arousal. The headline difference is speed: avanafil tends to act faster, while sildenafil is the established standard. A healthcare professional can help you decide which profile fits your needs.

General information only — not medical advice. Always read the patient information leaflet and consult a doctor or pharmacist before starting any medication.