You should take finasteride once a day with or without food. (It is important to take the medication daily to sustain the benefit. Remember, it can take up to 1 year to see the full benefits.)
Finasteride is for use by men only. Women who are (potentially) pregnant in the same household should not handle broken or crushed tablets of finasteride as this might lead to abnormal development of the male baby.
Also, same as everything we try for the first time, you have to watch for an allergy reaction after taking finasteride, despite its rare occurrence. If you experience itchy skin rashes, swollen eyes/lips/face/tongue, and shortness of breath, please head to the nearest emergency service or call 995 immediately.