Side Effects of Generic Avanafil – Overview, Frequency and Tips

As with all PDE5 inhibitors, side effects can occur with generic Avanafil. Fortunately, most users experience only mild complaints or no side effects at all. Thanks to its high selectivity for PDE5, Avanafil often has a more favorable side effect profile than older medications. Below is a complete and up-to-date overview (updated March 2026).

Common side effects (mild and temporary)

These complaints occur in some users and usually disappear on their own within a few hours:

• Headache – The most commonly reported side effect. Usually mild to moderate in intensity.
• Facial flushing / warm feeling – Due to the dilation of blood vessels, the face may become red or feel warm.
• Stuffy or runny nose – A temporary stuffy or runny nose occurs regularly.
• Back or muscle pain – Occurs less frequently than with tadalafil (Cialis), but can occur in some users.
• Stomach complaints or heartburn – Some men experience mild stomach complaints.
• Dizziness – Especially the first time or at higher dosages, mild dizziness can occur.

Less common side effects

• Stuffy nose in combination with sore throat
• Mild nausea
• Increased heart rate or palpitations (usually mild)
• Increased light sensitivity (less often than with sildenafil)

Rare but serious side effects

Although very rare, the following complaints can occur. If these symptoms appear, contact a doctor or emergency services immediately:

• Sudden vision problems – Reduced vision, blurred vision, blind spots or sudden loss of vision in one or both eyes. This may indicate a serious condition (NAION).
• Sudden hearing problems – Sudden reduction or complete loss of hearing, often in combination with tinnitus.
• Priapism – An erection that lasts longer than 4 hours and is painful. This is a medical emergency that must be treated immediately to prevent permanent damage.

Comparison of side effects: Avanafil vs Viagra vs Cialis

Side effect	Avanafil	Sildenafil (Viagra)	Tadalafil (Cialis)
Headache	Common	Common	Common
Visual complaints	Rare	Often reported	Rare
Back/muscle pain	Less often	Less often	Often reported
Nose complaints	Common	Common	Common

When should you consult a doctor?

Most side effects are mild and disappear within a few hours to a day. Contact a doctor if:

• Persistent or severe complaints that interfere with daily life
• Sudden vision or hearing problems
• An erection that lasts longer than 4 hours
• Side effects that worry you, especially if you use other medications

Tips to reduce the chance of side effects

• Start with 50 mg if you are sensitive to side effects
• Avoid excessive alcohol on the day of use
• Drink plenty of water
• Do not take the medication right after a very heavy meal if you are sensitive to that
• Do not use Avanafil more than once per 24 hours

Related articles:
How Does Generic Avanafil Work? • Avanafil vs Viagra and Cialis

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