“…Regular fixed regimens for the administration of chronic drugs may not be compatible with physiological variabilities in biology, and this can underlie the loss of response to chronic drugs [ 26 , 28 , 47 , 48 , 49 ]. However, introducing variability into therapeutic regimens can improve the response to drugs [ 26 , 27 , 28 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 ]. Dose escalations, reductions, and intermittent dosing with drug holidays exert clinical benefits while minimizing adverse effects [ 20 , 60 , 61 , 62 , 63 ].…”