We constantly see in dermatological diseases using a combination of medications with different mechanisms of action, works better than either one when used alone. There was a study looking at the Stumptail macaque Monkey, who appears to have a similar pathogenesis of balding as humans. Unfortunately, there has been no studies presently performed on humans to prove this point. Yes, there is no evidence that these agents would interfere with the effectiveness of minoxidil. Wait till the minoxidil dries before using any other product.
Hair grows in a cyclical nature.
As the new hairs grow in, the old hairs are released resulting in shedding. When you start minoxidil, some of the hair follicles may be shifted from the resting phase into the growth phase resulting in a temporary increase in shedding. This increase in shedding usually starts 2-6 weeks after beginning treatment and subsides within a few weeks. After applying minoxidil to the scalp, it must remain on the scalp for at least 4 hours so that the medication may be absorbed into the scalp. You can use it more than twice a day and there are many patients and physicians who think it works better when it is used more than twice a day.