Side effects of Fenisteride

The short version: the evidence you retrieved contains nothing about finasteride side effects. The retrieval is off-topic.

The records you provided cover painkillers, rabies vaccine, COVID-19 vaccines, cancer drugs, antidepressants, surgical procedures, and sexual dysfunction studies in general populations. None of them test or report side effects of finasteride. The closest match is a study of tadalafil coadministered with finasteride [1], but that study compares tadalafil/finasteride to placebo/finasteride, not finasteride to placebo. It reports that sexual dysfunction adverse events were low in both groups (5 events in the tadalafil/finasteride arm, 7 in the placebo/finasteride arm) [1]. That tells you nothing about finasteride's side effect profile on its own.

Finasteride's well-documented side effects include sexual dysfunction (decreased libido, erectile dysfunction, ejaculation disorders), depression, and a small subset of men who report persistent sexual side effects after stopping the drug. The evidence here does not contain the studies that established those risks. The retrieval simply missed the relevant literature.

My call: the evidence you provided does not answer the question. The known side effects of finasteride are documented elsewhere, but none of the records above address them. Confidence: not clear from this retrieval.