Alternate safe medicine available...You are suffering from hormonal changes causing Androgenetic alopecia causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

When using minoxidil, the telogen hair fall n convert to anagen or growth phase. You may see hairfall for sometime but would grow again. If feeling itchy then its normal with alcohol containing minoxidil. If having allergic reactions, you can discontinue it and use other substitutes.