Do doctors of osteopathy usually pracrice allopathic medicine

Definition of Osteopathy
os·te·op·a·thyˌästēˈäpəTHē/nouna branch of medical practice that emphasizes the treatment of medical disorders through the manipulation and massage of the bones, joints, and muscles.

explanation of Allopathic Medicine 

Allopathic medicine is an expression commonly used by homeopaths and proponents of other forms of alternative medicine to refer to mainstream medicaluse of pharmacologically active agents or physical interventions to treat or suppress symptoms or pathophysiologic processes of diseases or conditions.

Yes doctors do practice allopathic  medicine.