Side effect of oral finasteride

[stefkampen]

it's even more effective, since you are applying it directly at the scalp, thus lowering scalp's 5ar activity and so scalp DHT levels. Also a small amount can go systemic, which can be seen as a benefit, because you are combating the problem from two sides: internal and external

[turbotnator]

The side effects you mention are normal and tend to subside after continued use - a little like antidepressants.

You won't get benefits from taking finasteride once a week. It requires sustained daily use for best results.