It is a prescription medicine used in the treatment of bipolar disorder and mania in adults. It is sometimes used to treat other behavioral disorders as well. It reduces the frequency of manic episodes and decreases the intensity of those episodes that might occur. Lithoril 300mg Tablet should be taken with food. However, it is advised to take it at the same time each day as this helps to maintain a consistent level of medicine in the body. Do not skip any doses and finish the full course of treatment even if you feel better. If you have missed a dose, take it as soon as you remember it. You should continue to take this medicine for as long as the doctor advises and do not stop taking it suddenly as it may result in harmful effects. Side effects associated with the use of this medicine include tremor, slurred speech, uncoordinated body movements, nausea, acne, increased white blood cell count and memory impairment. It may also cause hair loss, enlarged thyroid gland, skin rash, and increased thirst. This medicine may also cause weight gain and to control it, you should have a balanced diet and exercise regularly. If you have been taking this medicine for a long time than regular monitoring of thyroid and kidney function may be required.