Medical News Today has strict sourcing guidelines and draws only from peer-reviewed studies, academic research institutions, and medical journals and associations. reducing nausea in people undergoing chemotherapy.reducing pain associated with certain medical conditions.When people use it medically, cannabis is often useful for the following: interference with brain development among teenagers.interference with fetal development during pregnancy.potential interference with tumor growth.aggravation of existing lung conditions, such as asthma, when a person smokes it.relief from the symptoms of glaucoma, for short periods.red eyes from the increase in blood flow.faster heart rate by 20–50 beats per minute.a weakened immune system due to the effects of tetrahydrocannabinol, which is the main psychoactive chemical in cannabis.lung irritation from irritants including some carcinogens, such as accidentally burning the mouth or throat when smoking.a higher likelihood of developing bronchitis, when a person smokes it.Some of the most common effects on physical health from cannabis use include:
