Side effects after contact with lithium include diarrhea, dizziness, nausea, fatigue and muscle weakness, explains WebMD. The patient may also experience frequent urination, tremors and thirst after using lithium for a while.
The side effects of lithium are classified as renal, gastrointestinal, nervous system, cardiovascular, hematological and dermatological, according to Drugs.com. Renal side effects include polydipsia and polyuria. Gastrointestinal side effects include diarrhea, nausea and abdominal pain. Nervous system side effects include tremors, seizures, vertigo and confusion. Cardiovascular side effects include hypotension and arrhythmia. Dermatological side effects include acne and exacerbation of psoriasis.
Side effects of an overdose include excessive trembling, blurred vision, and clumsiness or unsteadiness, states Mayo Clinic. It is advisable to call the doctor if any of the side effects become severe or do not go away, says MedlinePlus.