Is it okay to use topical compound lotion that has 6% minoxidil and 0.05% finasteride plus oral finasteride?

Hello, I am 51 year old I've been using for almost half a year a Topical compound lotion that has 6% minoxidil and 0.05% finasteride. I use it twice a day - 1 mg each time. In total it's like 1mg of Fin per day. One of the HT doctors suggest me to add oral daily 0.5 mg finasteride as well. I want to know please if its ok to combine oral and topical finasteride or it can make side effects and mess up my Hormones? Thank you.