No branch of chemistry is specifically concerned with the study of medicine.
But many branches of chemistry deal with particular aspects of medicine.
Here are some of them.
Biochemistry is the study of the chemicals and chemical reactions that take place in living organisms.
Medicinal chemistry deals with the discovery and development of new medicinal agents.
Toxicology is a branch of chemistry that studies the adverse effects of chemicals on living organisms.
Immunochemistry involves the study of the immune system, especially the nature of antibodies and antigens and their interactions.
Neurochemistry is the study of neurotransmitters, peptides, proteins, lipids, sugars, and nucleic and the roles they play in forming, maintaining, and modifying the nervous system.
Bioinorganic chemistry studies the role of metals in biochemical processes.
Biophysical chemistry uses physical methods such as nuclear magnetic resonance (NMR) and X-ray diffraction to study biological systems.