1. Not having a medicinal effect or not medically prescribed
   "he took mind-altering drugs for nonmedicinal reasons"
   - unmedicinal, unmedicative, unmedical

See also: unhealthful

• double-propeller plane
• double-quick
• double-reed instrument
• double-space
• double-spaced
• double-spacing
• double-team
• double-tongued
• double-u
• doubled
• doubleheader
• doubler
• doubles
• doublespeak
• doublet
• doublethink
• doubleton
• doubletree
• doubling
• doubloon
• doubly
• doubly transitive verb
• doubly transitive verb form
• doubt
• doubtable