Hi & Welcome. For the treatment of hives, Cetrizine is usually prescribed in the dose of 5 to 10 mg orally once daily. The most common side effects include mild drowsiness, dry mouth, fatigue which are well tolerated by most of our patients. It is quite safe for you kidney. It is a pregnancy category B drug assigned by the FDA which means high dose animal studies have failed to reveal evidence of teratogenicity (harmful effects in the growing fetus). It is found to be safe during pregnancy. Apart from medication, the following precautions may help prevent or soothe the recurring skin reactions of chronic hives: 1. Wear loose cotton clothing 2. Avoid scratching or using harsh soaps. 3. Cool the affected area with a shower, fan, cool cloth or soothing lotion. 4. Avoid known triggers, such as certain foods or additives, alcohol, pain relievers, heat, cold, exertion, and stress. Hope the advice given above would be useful.