Which medication is commonly prescribed for hair thinning but is not classified as an androgen suppressor?

Minoxidil is commonly prescribed for hair thinning and is a topical treatment that is effective in stimulating hair growth. It works primarily by increasing blood flow to the hair follicles, which helps to revitalize shrunken hair follicles, allowing for more robust hair growth.

What sets minoxidil apart from other medications listed is that it does not function as an androgen suppressor. Androgen suppressors, such as finasteride and spironolactone, work by blocking or inhibiting the effects of androgens (male hormones) on hair follicles, which can lead to hair thinning in some individuals.

Minoxidil's mechanism of action focuses on enhancing blood circulation and promoting growth rather than altering hormone levels. Therefore, it is the appropriate choice for this question regarding medications for hair thinning that are not classified as androgen suppressors.