. . . "If you have any of these other conditions, you may need an acyclovir dose adjustment or special tests: kidney disease (or if you are on dialysis); liver disease; a brain or nervous system disorder such as Parkinson's disease, schizophrenia, or tardive dyskinesia; or an electrolyte imbalance (such as high or low levels of calcium, sodium, or potassium in your blood)." . .