The branch of medicine involving synthetic chemical compounds is

Allopathy which is the most widely followed system uses laboratory synthetic chemical composition as drugs. It refers to mainstream medical use of pharmacologically active agents or physical interventions to treat or suppress symptoms or pathophysiologic processes of diseases or conditions. t the root cause might be a completely different one...it might be the imbalance due to lack of sleep/rest, physical/emotional stress, improper food at improper time etc