Chlorpromazine has 28 known drug interactions based on U.S. FDA drug labeling data. Of these, 2 are contraindicated combinations that should be avoided entirely. 5 are classified as major interactions requiring close medical supervision. Notable interactions include combinations with Macimorelin Acetate, Pimozide, Clorazepate Dipotassium. Patients taking Chlorpromazine should inform their healthcare provider of all current medications — including over-the-counter drugs and supplements — to avoid potentially harmful combinations. Data sourced from OpenFDA and the NIH National Library of Medicine.
- Total
- 28
- Contraindicated
- 2
- Major
- 5
- Moderate
- 21
Contraindicated (2)
- Chlorpromazine + Macimorelin Acetate— Co-administration may lead to torsade de pointes-type ventricular tachycardia due to QT prolongation. Avoid concomitant …
- Chlorpromazine + Pimozide— Additive QT interval prolongation effect anticipated, increasing risk of ventricular arrhythmias.
Major (5)
- Chlorpromazine + Clorazepate Dipotassium— Clorazepate dipotassium increases the inhibitory effects of chlorpromazine.
- Chlorpromazine + Fingolimod— QT-prolonging drug with known torsades de pointes risk. Combined with fingolimod's QT prolongation and bradycardia effec…
- Chlorpromazine + Fingolimod Hydrochloride— QT-prolonging drug associated with torsades de pointes risk. Patients require overnight continuous ECG monitoring in med…
- Chlorpromazine + Phenylephrine Hydrochloride— α-adrenergic blocking agent (phenothiazine) that blocks phenylephrine and is in turn blocked by phenylephrine.
- Chlorpromazine + Tetrabenazine— Antipsychotic that prolongs QTc interval and increases risk for Parkinsonism, NMS, and akathisia when used concomitantly…
Moderate (21)
- Chlorpromazine + Amphetamine— Dopamine antagonist that blocks the effects of amphetamines.
- Chlorpromazine + Amphetamine Sulfate— Blocks dopamine and norepinephrine reuptake, potentially inhibiting central stimulant effects of amphetamine.
- Chlorpromazine + Carbamazepine— Mixing carbamazepine suspension with chlorpromazine solution results in formation of an orange rubbery precipitate. Shou…
- Chlorpromazine + Desmopressin Acetate— Concomitant use may increase risk of water intoxication with hyponatremia; requires more frequent serum sodium monitorin…
- Chlorpromazine + Desmopressin Acetate Oral Solution— May increase risk of water intoxication with hyponatremia. Monitor serum sodium more frequently.
- Chlorpromazine + Dextroamphetamine Saccharate And Amphetamine Aspartate And Dextroamphetamine Sulfate And Amphetamine Sulfate— Chlorpromazine blocks dopamine and norepinephrine receptors, inhibiting the central stimulant effects of amphetamines an…
- Chlorpromazine + Fingolimod Lauryl Sulfate— QT prolonging drug with torsades de pointes risk. Monitor overnight with continuous ECG in medical facility during initi…
- Chlorpromazine + Haloperidol Decanoate— CYP2D6 inhibitor that increases haloperidol plasma concentrations; monitor for increased adverse effects including QTc p…
- Chlorpromazine + Haloperidol Lactate— CYP2D6 inhibitor that increases haloperidol plasma concentrations, raising risk of adverse events including QTc prolonga…
- Chlorpromazine + Metoprolol— Potent CYP2D6 inhibitor may increase plasma concentration of metoprolol, decreasing cardioselectivity.
- Chlorpromazine + Metoprolol Tartrate— Potent CYP2D6 inhibitor may increase metoprolol plasma concentration, decreasing cardioselectivity.
- Chlorpromazine + Phenylephrine Hci— Phenothiazine α-adrenergic blocking agent that blocks phenylephrine and is blocked by phenylephrine.
- Chlorpromazine + Phenylephrine Hydrochloride Injection, Solution— Alpha-adrenergic blocking agent blocks phenylephrine and is in turn blocked by phenylephrine.
- Chlorpromazine + Polyethylene Glycol 3350, Sodium Sulfate, Potassium Chloride, Magnesium Sulfate, And Sodium Chloride For Oral Solution— SUFLAVE can reduce absorption of chlorpromazine. Administer at least 2 hours before and not less than 6 hours after SUFL…
- Chlorpromazine + Sodium Picosulfate, Magnesium Oxide, And Anhydrous Citric Acid— Reduced absorption of chlorpromazine due to chelation with magnesium. Administer at least 2 hours before and not less th…
- Chlorpromazine + Sodium Sulfate Anhydrous, Potassium Sulfate, And Magnesium Sulfate— Sodium sulfate, potassium sulfate, and magnesium sulfate oral solution can reduce absorption of chlorpromazine via chela…
- Chlorpromazine + Sodium Sulfate, Magnesium Sulfate, And Potassium Chloride— Reduced absorption due to chelation with magnesium. Administer at least 2 hours before and not less than 6 hours after S…
- Chlorpromazine + Sodium Sulfate, Potassium Sulfate, Magnesium Sulfate— Administer at least 2 hours before and not less than 6 hours after SUPREP to avoid chelation with magnesium and reduced …
- Chlorpromazine + Tranexamic Acid— Concurrent use may result in increased risk of bleeding.
- Chlorpromazine + Zolpidem Tartrate— Additive effect of decreased alertness and psychomotor performance observed. No pharmacokinetic interaction.
- Chlorpromazine + Zolpidem Tartrate Sublingual— Additive effect of decreased alertness and impaired psychomotor performance observed with no pharmacokinetic interaction…