Ivermectin (Mectizan) 3mg tablets are indicated for the treatment of certain parasitic infections such as river blindness and lymphatic filariasis, contraindicated in patients with a known hypersensitivity to ivermectin, may cause side effects such as dizziness, itching, or gastrointestinal disturbances, and can interact with drugs that affect the cytochrome P450 enzyme system, potentially altering its metabolism.