Pill

A Pill or Tablet is a small dosage of medicine that is taken orally.

During a bout of insomnia, Doctor Leonard McCoy contacted Captain James T. Kirk to inform the Captain about his trouble sleeping. Kirk advised McCoy to try taking the same kind of red sleeping pill that McCoy had given him a week before, noting that McCoy would have no trouble sleeping then. 

Pills could also be used to poison individuals. Determined to seek revenge against his former USS Stargazer (NCC-2893) crewmates, Doctor Carter Greyhorse brought a supply of Ku'thei pills on board the USS Enterprise (NCC-1701-D) when several of the surviving Stargazer crew boarded the Enterprise on a journey to Daa'V in 2367. Not well known to Federation science at the time, the pills were not flagged or screened out by Starfleet transporters. Greyhorse attempted to poison both Commander Tricia Cadwallader and Captain Gilaad Ben Zoma before he was stopped. After being arrested his supply of Ku'thei pills was discovered in his quarters.