Commonly reported effects
The most commonly reported side effects are sexual in nature (for example, decreased libido or erectile changes). These effects were uncommon in trials but can occur. If you have concerns, discuss them with your prescribing clinician.
The nocebo effect
Expectations and anxiety can influence how symptoms are noticed and reported. This does not mean symptoms are “imagined” — but it is one reason careful counseling and follow-up matter.
Post-finasteride syndrome
Some patients report symptoms that persist after stopping finasteride, sometimes described as “post-finasteride syndrome.” This topic is debated and remains an area of ongoing research. If you have persistent or severe symptoms, seek medical advice.
Risk mitigation
Ask your prescriber about expected benefits, side effects, and what to do if symptoms occur. If you develop concerning side effects, seek medical advice promptly.