As of now medicines are being taken without regard of the time as there is not much awareness among the health care practitioners that time of drug administration in some of the drugs and diseases can make a huge difference in their pharmacokinetics as well as therapeutic response.
There is a Biological clock in our body, Master Clock being situated in the hypothalamus and Peripheral clocks in the organs. There are clock genes which regulate the release of hormones and metabolic events at rhythmic intervals in our body.
The biological rhythms what we call are hypothetical cycles and are of three types namely Circadian (24 cycle), infradian (> 24 cycle) and ultradian (< 24 hrs), the most popular one being circadian rhythm. Read more. . .