I am using Tricovin serum for hair are there any side effects?

There is no evidence that shampoos with tea tree oil help in hair loss, either autoimmune in nature or genetic in nature

The best way is to stop the use of Minoxidil. After stopping use you will return to the way you were before starting.

Initially, 2% Minoxidil was the only strength for women.  It's use was twice daily.   Now the 5% strength is FDA approved for women, but only once daily. If you are having good results there is no need to change.