Carbamazepine test measures the amount of the carbamazepine medicine in the blood. Carbamazepine is the generic name of a medicine with brand names like Tegretol, Equetro, and Carbatrol which is used to treat pain, bipolar disorder, mania, and epilepsy. The test is ordered when a person develops complications or experiences a troublesome level of side effects. Higher concentration of carbamazepine level in the blood results in symptoms like sleepiness, dizziness, blurred or double vision, uncoordinated movement and involuntary back and forth movement of the eyeball. Continuous intake of the medicine for a period of time may result in higher sensitivity to its effects. The test needs to be performed at the proper time so that it doesn’t reach a toxic level which may cause serious problems.