Hi. I can understand your concerns regarding the safety of zeptol. Purpose of taking zeptol?? Zeptol (carbamazepine) is used to control seizures (convulsions) and a painful nerve condition called trigeminal neuralgia. Generally it is well tolerated by most of my patients, however it may cause nausea, vomiting, drowsiness, dry mouth, allergic rash, swollen tongue or lips, and loss of balance or coordination. It is also known to cause harmful interactions with certain medications when taken together. Hope I could answer your query. Let me know if I can assist you further. A feedback is appreciated.