RCW 66.20.110: Dentist may administer liquor—Penalty.

Any dentist who deems it necessary that any patient then under treatment by him or her should be supplied with liquor as a stimulant or restorative may administer to the patient the liquor so needed, and for that purpose the dentist shall administer liquor obtained by him or her under special permit pursuant to this title, and may charge for the liquor so administered; but no liquor shall be administered by a dentist except to bona fide patients in cases of actual need; and every dentist who administers liquor in evasion or violation of this title shall be guilty of a violation of this title.