thoughtscape NP Psychiatry · Patient education
Chlorpromazine
Thorazine • tablets: 10, 25, 50, 100, and 200 mg
An older antipsychotic with several other uses. The goal is symptom relief without burdensome sleepiness or other harms.
Draft for review · Clinical content has not been revalidated for this website.
Thorazine is a former US brand. Follow your prescribed formulation and schedule; injection instructions differ.
What it is used for
Uses include schizophrenia, other psychoses, mania, nausea, vomiting, and persistent hiccups.
Other labeled uses are specialized. Anxiety or insomnia use is off-label and limited by risks. Ask about your goal.
How it works
Blocks dopamine signals, helping reduce psychotic symptoms and nausea.
Other actions cause sleepiness, low standing BP, and dry mouth. Low potency does not mean weak benefit or low risk.
What to expect over time
EARLY DAYS
Sleepiness or dizziness can arrive before symptom relief. Being heavily sedated is not proof that treatment is working.
OVER WEEKS
Psychosis or mania may improve gradually. Review thinking, sleep, and daily function, not just whether you feel calmer.
ONGOING CARE
Benefits and harms need regular review. Movement, weight, and eye checks remain important; low doses are not risk-free.
Taking your medication
Use only your prescribed schedule. Ask before moving doses to bedtime or using extra doses for sleep. Some prescriptions are as-needed, with specific limits.
Avoid alcohol. Do not drive until you know your response. Rise slowly; ask for help if dizzy. Avoid overheating and use sunscreen, clothing, and shade.
Do not abruptly stop long-term treatment. Agree on a taper. Missed-dose advice is on the “Your questions, answered” section; never double doses.
When to get help
Emergency care: fever with stiffness/confusion, seizure, collapse, breathing, or swallowing trouble, or severe allergy. Sudden neck, jaw, or eye spasms need urgent care.
Urgent assessment: fainting, palpitations, severe constipation/belly pain, inability to urinate, jaundice, severe rash, or an erection lasting 4 hours.
Call promptly: fever/sore throat, new involuntary movements, or worsening mood. Immediate self-harm danger needs emergency help.
Early side effects
Sleepiness, dry mouth, constipation, blurred vision, and dizziness can occur. Dental care, fluids, and a bowel plan may help. Report sedation, falls or persistent constipation.
Other effects to discuss
Report weight, sexual or menstrual changes, breast discharge, restlessness, or new movements. Prolonged higher doses can affect skin and eyes; report vision changes promptly.
What to keep track of
Check movements, weight, blood sugar, cholesterol, and sitting/standing BP. Blood counts, liver tests, ECGs, and eye exams depend on risk and symptoms. Prior low white cells need closer checks.
Before you start
Discuss heart disease, fainting, seizures, liver/kidney disease, low white blood cells, breathing problems, constipation, urinary trouble, glaucoma, Parkinson disease, or Lewy body dementia. Mention prior phenothiazine reactions, planned surgery, and all medicines. It raises death risk in older adults with dementia-related psychosis and is not approved for that use. Children's regimens need a separate specialist plan.
Medicines & interactions
Alcohol and sedating medicines
Avoid alcohol. Opioids, benzodiazepines, sleep aids, and sedating antihistamines can worsen drowsiness, falls and breathing risk.
Blood pressure, heart rhythm, and bladder medicines
Some combinations increase fainting, rhythm problems, constipation, confusion, or urinary trouble. Ask about OTC allergy/cold products too.
Lithium, Parkinson medicines, and smoking changes
Lithium needs toxicity monitoring; chlorpromazine can oppose levodopa and related medicines. Starting or stopping smoking may change exposure. Tell your team; do not adjust the dose yourself.
Antacids and any new medicine
Ask a pharmacist to review the full list. Antacids may need more than two hours' separation from chlorpromazine. Keep other prescribed intervals.
Everyday tips
Track target symptoms, sleep, daily activities, bowel function, and side effects. Bring the record to visits.
Use sun protection even on mild days; avoid excessive heat. Report new skin discoloration or visual changes.
Report feeling emotionally flat or unable to function. Do not assume it always means the dose is too high; it needs review.
Ask for support with treatment routines and a plan for symptoms returning. Restlessness may be a medicine effect rather than worsening illness.
Your questions, answered
What if I miss a dose?
For scheduled treatment, take it when remembered unless the next dose is near; then skip it. Never double. For as-needed treatment, follow the prescribed reason, interval, and maximum.
Can I stop when I feel better?
Plan changes with your clinician. Sudden stopping after regular use may cause nausea, sweating, poor sleep, dizziness, new movements, or returning symptoms. Emergency reactions need urgent assessment, not routine tapering.
What about pregnancy or breastfeeding?
Discuss benefits and risks before changes. Late-pregnancy exposure can affect newborn movement, breathing, or feeding. The US label advises choosing between breastfeeding and treatment based on maternal need; make an individual plan.
What if I take too much?
Call Poison Help at 1-800-222-1222 immediately, even without symptoms. Call 911 for seizure, collapse, breathing trouble, or inability to wake. Do not induce vomiting.
Storage & safety
Store securely in the labeled container, away from children, pets, heat and moisture. Never share. Ask a pharmacy about safe disposal.
About this information
For general information only; not a substitute for individualized medical advice. This sheet does not cover every risk or interaction. Ask your prescriber or pharmacist before changing how you take this medication.
Sources
Educational inclusion does not mean this medication or its indications are treated at this practice. Review the guide for your exact product with your prescriber or pharmacist.