[Controlled Substances] (Gravol®) is not a controlled substance but has been included here for reference purposes as it is often given with morphine to counteract the side effects of nausea and vomiting.
Dimenhydrinate is categorized in a class of drugs called antihistamines. It competes with histamine for H1-receptor sites on effector cells in the respiratory tract, gastrointestinal tract and blood vessels; blocks chemoreceptor trigger zones. Read more
[Controlled Substances] Morphine sulphate (morphine) is an opioid. It binds to opiate receptors in the CNS, causing inhibition of pain pathways, altering perception and pain response and producing generalized CNS depression. Morphine has a similar analgesic action to Demerol® (Meperidine), but with less nausea and fewer significant side effects for the neonate. Read more