Clozaril

If you stop taking Clozaril for more than 2 days, do not start taking it again without consulting your physician.

• Storage instructions...
  Store at room temperature.

What side effects may occur?

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Clozaril.

The most feared side effect is agranulocytosis, a dangerous drop in the number of a certain kind of white blood cell. Symptoms include fever, lethargy, sore throat, and weakness. If not caught in time, agranulocytosis can be fatal. That is why all people who take Clozaril must have a blood test every week. About 1 percent develop agranulocytosis and must stop taking the drug.

Seizures are another potential side effect, occurring in some 5 percent of people who take Clozaril. The higher the dosage, the greater the risk of seizures.

• Side effects may include:
  Blood disorders, constipation, drowsiness, dry mouth, fainting, fever, headache, low blood pressure, nausea, salivation, sweating, rapid heartbeat, tremor, vertigo, vision problems

Why should Clozaril not be prescribed?

Clozaril is considered a somewhat risky medication because of its potential to cause agranulocytosis and seizures. It should be taken only by people whose condition is serious, and who have not been helped by more traditional antipsychotic medications such as haloperidol or thioridazine hydrochloride.

You should not take Clozaril if:

• You have a bone marrow disease or disorder;
• You have epilepsy that is not controlled;
• You ever developed an abnormal white blood cell count while taking Clozaril;
• You are currently taking some other drug, such as Tegretol, that could cause a decrease in white blood cell count or a drug that could affect the bone marrow;
• You have ever had an allergic reaction to any of its ingredients.

Special warnings about Clozaril

Clozaril can cause drowsiness, especially at the start of treatment. For this reason, and also because of the potential for seizures, you should not drive, swim, climb, or operate dangerous machinery while you are taking this medication, at least in the early stages of treatment.