She says, "You should not be applying tretinoin like this directly on your scalp," adding what harmful effects this may have, "It is only going to give you more irritation or post-inflammatory ...

Up-to-date clinical research indicates that tretinoin can enhance the effects of minoxidil for hair growth. The most common side effects of tretinoin are skin irritation, dryness, and itching.

Price: Starting at $43 per month Active Ingredients: Finasteride, minoxidil, tretinoin Inactive ingredients: Propylene glycol, citric acid, glycereth-5 lactate, isoamyl laurate, ethyl alcohol ...