If I take the contents of a finasteride pill, mix water, oil or onion juice with it, and apply it to my hair, will this work?

In my country (France), the topical finasteride is still not available, even though there're some research in French about the effectiveness of topical finasteride. I'd like to avoid the oral finasteride for its bad side effect-ED. Hence, I was thinking: what if I take the power or contents out of the pill, mix water, oil or onion juice with it, and apply it to my hair? Will that help my hair grow or stop hair fall like the finasteride solution does? Thank you!