Topical Fin 2.5 sides but no sides on Oral, need advice?

Treatments Finasteride
1

I Bought it but my buddy hoped on in then had side effects because apparently it goes sistemic anyway.Took a little brake then he jumped on oral fin 0.25 for the first month then second month 0.5 how on 1 mg every other day no sides.Any thoughts or recommendations?

2

Doesn’t make sense but stick with whatever he thinks isn’t causing side effects