Hi.Can understand your concern..As per your query about minoxidil side effects,it is not known to cause any type of sexual dysfunctions .Minoxidil is applied topicaly to the scalp in the required amount as directed by the physician or dermatologist.It is known to increase the blood supply of scalp and this preventing hair loss and helps in regeneration of hair follicles.You should use this drug before PRP as it will primarily reduce your hairloss problem as you are going to be married soon..Since you have family history of hair loss ,try first to control the hair loss by using this medicine for sometime.If not controlled by this you can go for PRP or other options like meso..You should also take multi vitamins supplements..Wash your hair with a mild shampoo and cover them if going to pollution exposure.I hope the information helps you.Take care.