<prompt> The following statement is true regarding chrono-pharmacology isStudy of time related effects of drugsStudy of dose related effects of drugsStudy of adverse effects of drugsStudy of naturally obtained drugs  <response>: Chrono-pharmacology is the science dealing with effects of drugs in relation to the biological clock. many drugs act by chronopharmacology like pantaprazole to given at night , long acting insulin to be goiven at night,bronchial asthma medication to be giving in the evening. Ref: Rituparna maiti 1st ed. 