Drug Interactions between chlorpromazine and magnesium sulfate / potassium chloride / sodium sulfate

The following interaction applies only if you are taking potassium in a solid formulation (i.E., tablet or capsule swallowed whole) for potassium supplementation:

Talk to your doctor before using potassium oral tablets or capsules together with chlorproMAZINE. Depending on the dose of chlorproMAZINE and your overall physical health, combining these medications may increase the irritant effects of potassium on your stomach and upper intestine. This can rarely result in ulcers, bleeding, and other gastrointestinal injury. Contact your doctor immediately if you develop severe abdominal pain, bloating, sudden dizziness or lightheadedness, nausea, vomiting (especially with blood), loss of appetite, and/or black, tarry stools during treatment with these medications. Alternatively, a liquid formulation of potassium may be considered when used in combination with chlorproMAZINE. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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ChlorproMAZINE can cause seizures and an irregular heart rhythm that may be serious and potentially life-threatening, although these are relatively rare side effects. The risk is increased if you have low blood levels of electrolytes such as calcium, magnesium, potassium or sodium, which can occur with bowel cleansing preparations or excessive use of medications that have a laxative effect. You should use sodium sulfate exactly as prescribed by your doctor, and drink plenty of clear liquids before, during, and after the cleansing process to avoid becoming dehydrated. ChlorproMAZINE and sodium sulfate should not be taken orally at the same time. You should take sodium sulfate at least 2 hours before or 6 hours after the chlorproMAZINE dose. Your doctor may be able to recommend specific fluids you can drink before starting chlorproMAZINE to help maintain your electrolyte levels. He/she may also want to monitor your electrolyte levels and/or heart rhythm. You should seek immediate medical attention if you develop sudden dizziness, lightheadedness, fainting, shortness of breath, or heart palpitations during treatment with these medications. In addition, you should let your doctor know if you experience signs and symptoms of low electrolyte levels such as weakness, tiredness, drowsiness, dizziness, confusion, tingling, numbness, muscle pain, cramps, nausea, or vomiting. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

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