Some serious side effects include: Uncontrollable movement or twitching of tongue, lips, eyes, arms or legs, Problems with walking, drooling, tremors, or trouble swallowing, Feeling agitated or restless, Seizure, High fever, rapid breathing, stiff muscles, sweating, confusion, uneven or fast heartbeat, Unusual behavior or thoughts, Flu symptoms, easy bruising, pale skin, Urinating less or not at all, Joint pain, swollen glands, chest pain, muscle aches, Watery eyes, tunnel vision, sensitivity to light, decreased night vision, Weak pulse, fainting Weight gain, Sleep problems, anxiety, and dizziness, Constipation, Blurred vision, stuffy nose or dry mouth, Irregular mensuration cycle, Swelling in breasts or discharge, Impotence
