Eskalith Drug Information and Side Effects on HealthSquare.com See all our sites for your special health needs at www.HealthCentral.com Eskalith is used to treat the manic episodes of manic-depressive illness, a condition in which a person's mood swings from depression to excessive excitement. A manic episode may involve some or all of the following symptoms:If the Eskalith dosage is too low, you will derive no benefit; if it is too high, you could suffer lithium poisoning. You and your doctor will need to work together to find the correct dosage. Initially, this means frequent blood tests to find out how much of the drug is actually circulating in your bloodstream. As long as you take Eskalith, you will need to watch for side effects. Signs of lithium poisoning include vomiting, unsteady walking, diarrhea, drowsiness, tremor, and weakness. Stop taking the drug and call your doctor if you have any of these symptoms.