Safety Profile
Poison by ingestion,
subcutaneous, intravenous, and
intraperitoneal routes. Experimental
teratogenic and reproductive effects. Human
systemic effects by ingestion: headache,
blood pressure elevation. Implicated in
aplastic anemia. When heated to
decomposition it emits very toxic fumes of
SOx, NOx, and Cl-.
Veterinary Drugs and Treatments
Prochlorperazine as a single agent is used in dogs and cats as an antiemetic.
The only approved products for animals are combination
products containing prochlorperazine, isopropamide, with or without
neomycin (Darbazine?, Neo-Darbazine?—SKB Labs) which
are no longer marketed in the USA. The approved indications for
these products include: vomiting, non-specific gastroenteritis, drug
induced diarrhea, infectious diarrhea, spastic colitis, and motion
sickness in dogs and cats (injectable product only).
Drug interactions
Potentially hazardous interactions with other drugs
Anaesthetics: enhanced hypotensive effect.
Analgesics: increased risk of convulsions with
tramadol; enhanced hypotensive and sedative
effects with opioids; increased risk of ventricular
arrhythmias with methadone.
Anti-arrhythmics increased risk of ventricular
arrhythmias with anti-arrhythmics that prolong
the QT interval, e.g. procainamide, disopyramide,
dronedarone and amiodarone - avoid with
amiodarone and dronedarone.
Antibacterials: increased risk of ventricular
arrhythmias with delamanid and moxifloxacin -
avoid.
Antidepressants: increase concentrations and
additive antimuscarinic effects, notably with
tricyclics; increased risk of ventricular arrhythmias
with citalopram and escitalopram - avoid; increased
risk of convulsions with vortioxetine.
Antiepileptics: antagonised (convulsive threshold
lowered).
Antimalarials: avoid with artemether/lumefantrine
and piperaquine with artenimol.
Antipsychotics: increased risk of ventricular
arrhythmias with droperidol and pimozide - avoid;
increased risk of ventricular arrhythmias with
risperidone.
Antivirals: concentration possibly increased with
ritonavir; increased risk of ventricular arrhythmias
with saquinavir - avoid.
Anxiolytics and hypnotics: increased sedative effects.
Atomoxetine: increased risk of ventricular
arrhythmias.
Beta-blockers: enhanced hypotensive effect;
increased risk of ventricular arrhythmias with sotalol.
Cytotoxics: increased risk of ventricular arrhythmias
with arsenic trioxide.
Desferrioxamine: avoid concomitant use.
Diuretics: enhanced hypotensive effect.
Lithium: increased risk of extrapyramidal side effects
and possibly neurotoxicity.
Pentamidine: increased risk of ventricular
arrhythmias.
