Ohio Rev. Code Ann. § 4731.30
(B)
(2) The board shall grant a certificate to recommend if both of the following conditions are met:
(4) This section does not apply to a physician who recommends treatment with marijuana or a drug derived from marijuana under any of the following that is approved by an investigational review board or equivalent entity, the United States food and drug administration, or the national institutes of health or one of its cooperative groups or centers under the United States department of health and human services:
(C)
(1) A physician who holds a certificate to recommend may recommend that a patient be treated with medical marijuana if all of the following conditions are met:
(b) A bona fide physician-patient relationship has been established through all of the following:
(D)
(G) A physician shall not do any of the following:
(H) A physician is immune from civil liability, is not subject to professional disciplinary action by the state medical board or state board of pharmacy, and is not subject to criminal prosecution for any of the following actions: