To ensure optimal effectiveness Lithonex 450mg Tablet XL should be consumed with food It is recommended to take it at the same time every day to maintain a consistent level of medication in the body It is crucial not to skip any doses and complete the full course of treatment even if there is an improvement in your condition If you happen to miss a dose take it as soon as you remember Continuing the medication as prescribed by your doctor is important Abruptly stopping the medication can have harmful effects Common side effects associated with Lithonex include tremors slurred speech uncoordinated body movements nausea acne increased white blood cell count and memory impairment Other possible side effects may include hair loss an enlarged thyroid gland skin rash increased thirst and weight gain To manage potential weight gain it is advisable to maintain a balanced diet and engage in regular exercise Additionally if you have been taking this medication for an extended period of time regular monitoring of thyroid and kidney function may be necessary