Cancer is a complex pathophysiological condition that produces an important number of death around the world. At present, there are different ways to treat cancer: chemotherapy, radiotherapy and surgery. Cancer chemotherapy used today in many cases is effective, but it is very toxic too. The endocannabinoid system is implicated in a variety of physiological and pathological processes, including cancer. Many studies have shown, since 1975, that both phytocannabinoids ?9-tetrahydrocannabinol (THC) and cannabidiol (CBD) offer an antioneoplastic activity. Latter, other researchers have displayed that endocannabinoids as anandamide (ANA) and 2-arachidonoylglycerol (2-AG) also present the same potential activity. Phytocannabinoids and endocannabinoids act through CB1 and CB2 receptors to produce that effect. However, THC -the main phytocannabinoid presenting anticancer action- as well as anandamide employed in pharmacological doses, produce important phycotropic effects, but these cannabinoid compounds do not produce major adverse reactions like conventional antineoplastic drugs. On this basis, scientists have to develop analogs or derivatives of cannabinoids/endocannabinoids that cannot induce psychotropic effects. It is important to study more deeply chronopharmacological aspects of cannabinoids/endocannabinoids in cancer therapy, although some is known today.
Corresponding Author: Mayorga Niño F.