"please do not use minocycline for acne. this drug caused me to contract psuedotumor cerebri (a pretty serious brain condition) i had been on my dosage of 100mg x2 per day for about a month. about two weeks in i began to have horrible headaches, which persisted throughout the whole day. one night the headache became so unbareable i needed to go into the er. i was diagnosed with an intractable headache and send home after a few iv bags. my headaches persisted but i ignored them and thought possibly the heat was causing them. about 2 weeks after my first visit i began to have double vision. i called my doctor and they order a mri immediately. the mri showed a build up of pressure on my optic nerve, caused by minocycline."