Keeps’ products are safe to use under the supervision of a doctor, whether that’s your own physician or a Keeps doctor. Finasteride is the one medication it offers that has some worrying potential side effects. Some men (2-3%) will experience sexual side effects from the drug, including low libido and even erectile dysfunction.Minoxidil and ketoconazole may produce some sensitivity in the scalp, and minoxidil may encourage hair growth on other parts of the body with regular contact. These are rare instances, however, and Keeps’ doctors are readily available to address any of your concerns.