Strut Topical Dutasteride Formula: Use the medicine exactly as directed. Using more medicine or applying it more often than prescribed will not make it work any faster, and may increase side effects. Do not take by mouth. Avoid getting this medication in your eyes or mouth, if this does occur, rinse with water. Apply once daily at night to dry, clean scalp, and wash hands after application. Wash any non-treatment area that this medication may have accidentally come into contact with to avoid unwanted hair growth. Allow to dry thoroughly and wash off in the morning, or after at least 4 hours. You may need to take Dutasteride for 3 months or more before you start seeing the benefits. You will need to continue the medication to keep your hair growth results.