Piperazine,1-(diphenylmethyl)-4-methyl- (82-92-8)

 Emoquil (82-92-8) is an antihistamine drug used to treat nausea, vomiting and dizziness associated with motion sickness, vertigo and post-operatively following administration of general anaesthesia and opioids. It is abused as an opiate/opioid-enhancing antihistamine booster and separately for its anticholinergic effects.It is a piperazine derivative with histamine H1-receptor antagonist (antihistamine) activity. The precise mechanism of action in inhibiting the symptoms of motion sickness is not well understood. It may have effects directly on the labyrinthine apparatus and on the chemoreceptor trigger zone. Cyclizine exerts a central anticholinergic (antimuscarinic) action.Its antimuscarinic action warrants caution in patients with prostatic hypertrophy, urinary retention, or glaucoma. Liver disease exacerbates its sedative effects. It cannot be combined with diclofenac, for example in the same syringe or bag of fluids, as a crystallisation reaction occurs. Its main off-label use is as an opioid/opiate potentiator, commonly preferred highly to other anti-histamines (most commonly used as opioid boosters: tripelennamine, hydroxyzine, meclizine, doxylamine, diphenhydramine, etc.). The drug Diconal is the opioid Dipipanone and Cyclizine combined for IV use (discontinued in the U.S. for its high abuse potential). Dipipanone's closest relative is methadone. Those using methadone recreationally combine cyclizine with their methadone dose, a combination that is known to produce strong psychoactive effects. It is also sold in combination with another opioid dipipanone under the brand name Diconal.Intravenous cyclizine produces the strongest effects, although it can also be taken orally to achieve a more euphoric high.