"be very careful with this medication as it may lead to pseudotumor cerebra which is a very serious side effect (though pretty rare) that can cause permanent vision loss. i was only on the medication from the end of november through middle of january; i was taking it twice a day. the beginning of january i started to have constant horrible headaches then tunnel vision when standing. i then started having severe head and neck pain, dizziness, my vision would go in and out and i felt an intense pressure in my head. i eventually ended up spending well over a week in the hospital, had 3 spinal taps due to very high icp and in the end with a vp shunt in my brain with a tube to my stomach that i&#039;ll have the rest of my life."