Chlorpromazine + Trihexyphenidyl is used to manage schizophrenia, a severe mental health condition, while reducing movement-related side effects caused by antipsychotic treatment.
This combination is commonly used for:
• Schizophrenia: Helps manage symptoms such as hallucinations, delusions, and disorganised thinking.
• Extrapyramidal side effects: Controls muscle stiffness, tremors, and restlessness that can occur with antipsychotic medicines.
Sedation or drowsiness
Dizziness or a headache
Dry mouth or blurred vision
Weight gain
Orthostatic hypotension
Chlorpromazine + Trihexyphenidyl works through two separate mechanisms to manage schizophrenia while limiting movement-related side effects.
Chlorpromazine is an antipsychotic. It blocks dopamine D2 receptors in the brain, reducing the excess dopamine activity linked to symptoms of schizophrenia such as hallucinations and disorganised thinking.`
Trihexyphenidyl is an anticholinergic. It blocks the action of acetylcholine, helping to balance the activity of dopamine and acetylcholine in the brain. This helps prevent muscle stiffness, tremors, and restlessness that can occur as a side effect of antipsychotic treatment.
Together, Chlorpromazine manages the underlying psychiatric symptoms while Trihexyphenidyl reduces movement-related side effects.

Doctor of Medicine

BAMS, FMC, MD Resident
Chlorpromazine + Trihexyphenidyl can be taken orally in the form of tablets and liquids.
Chlorpromazine + Trihexyphenidyl is typically prescribed for adults above the age of 18 years.
This medicine is contraindicated in patients with a known hypersensitivity to either chlorpromazine or trihexyphenidyl or any of the components of the formulation.
It is also contraindicated in patients with conditions such as comatose states, severe central nervous system depression, certain blood dyscrasias, narrow-angle glaucoma, severe liver or kidney impairment and bone marrow suppression.
Chlorpromazine + Trihexyphenidyl may interact with central nervous system depressants (such as phenobarbital), anticholinergics (like atropine and scopolamine), tricyclic antidepressants (such as amitriptyline and imipramine) and antihypertensives (like lisinopril and amlodipine).
Taking more than the prescribed dose may cause drowsiness, confusion, agitation, severe dizziness, fast or irregular heartbeat, difficulty breathing, seizures, muscle spasms, dry mouth, blurred vision, difficulty passing urine, or loss of consciousness. Seek immediate medical attention if you suspect an overdose.
If you miss a dose of Chlorpromazine + Trihexyphenidyl, take it as soon as you remember. If it is almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not take a double dose to make up for a missed one.
Most side effects are temporary and generally harmless and resolve when discontinuing this medicine. However, if you experience any severe side effects or worsening of any of the symptoms, please consult your doctor.
If the medication causes dry mouth, drink plenty of water or chew sugarless gum to stimulate saliva production.
If you experience drowsiness or dizziness, ensure that you are well-rested before performing activities that require alertness.
Chlorpromazine + Trihexyphenidyl may cause drowsiness and impair your ability to drive or operate heavy machinery. Avoid these activities if you feel dizzy or sleepy after taking this medication.
The use of Chlorpromazine + Trihexyphenidyl during pregnancy or while breastfeeding is generally not recommended unless your doctor deems it necessary.
Caution is advised when using Chlorpromazine + Trihexyphenidyl in patients with liver or kidney disease.
Elderly patients and those with brain damage should also use this medicine with caution as they may be more susceptible to its side effects.
A healthy diet rich in fruits, vegetables, whole grains and lean proteins can help improve overall mental health.
Regular physical activity can also improve mental well-being and may enhance the effectiveness of mental health treatments.
Adequate sleep is essential for mental well-being. Try to establish a regular sleep schedule and maintain good sleep hygiene.
Frequently asked questions
No, Chlorpromazine + Trihexyphenidyl is not a steroid. Chlorpromazine is an antipsychotic, and Trihexyphenidyl is an anticholinergic used to manage side effects of antipsychotic medications.
Yes, one of the common side effects of Chlorpromazine + Trihexyphenidyl is sedation or drowsiness, which might affect sleep patterns. It is advisable to take it under the supervision of a doctor.
Chlorpromazine + Trihexyphenidyl is not directly associated with affecting fertility. It is advisable to consult your doctor if you have concerns related to fertility while taking this medicine.
Yes, this medicine can be taken daily as prescribed by a doctor. Remember to follow all instructions related to dosage and timing.
The exact time for this medicine to start working can vary for different individuals. Consult your doctor for more details.
Chlorpromazine + Trihexyphenidyl is a prescription medicine, and it cannot be bought over the counter.
Yes, Chlorpromazine + Trihexyphenidyl can have an impact on your mood as it helps in managing the symptoms of schizophrenia, including hallucinations and delusions, which can affect your feelings and emotions.
Chlorpromazine + Trihexyphenidyl in other salts
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