Sedative
From Memory Alpha, the free Star Trek reference
A sedative is a drug used to calm down a patient or to induce sleep.
Sedatives are often administered with a hypospray in a dosage of usually not more than several ccs.
Aldebaran mud leeches can be used to treat insomnia as their secretions act as a natural sedative. (ENT: "Anomaly")
Captain Picard's aunt Adele's recipe for a warm milk toddy was working perfectly as a natural sedative, as the heat activated amino acids in the lactose and it also tasted delicious. (TNG: "Schisms")
Constable Odo told the Rakhari criminal Croden he would sedate him if he won't be quiet during their trip to Rakhar. (DS9: "Vortex")
Makara herbs can act as an antidote to sedatives. While taking these herbs during her pregnancy, Major Kira Nerys was able to overpower Silaran Prin by pretending the sedatives he gave her worked. (DS9: "The Darkness and the Light")
