Psychoactive drugs are administered via oral ingestion as a tablet, capsule, powder, liquid, and beverage; via injection by subcutaneous, intramuscular, and intravenous route; via rectum by suppository and enema; and via inhalation by smoking, vaporization and insufflation ("snorting").
The psychiatric drugs fluoxetine, quetiapine, and lorazepam are ingested orally in tablet or capsule form.