"i have degenerative disc disease in my back and neck along with two shoulder surgeries. i get unbelievable tension headaches. this medication works outstanding. i have been on it for three years. i can take it at work and not get that nasty groggy feeling. i do not have to take it all of the time. i do not have any side effects except exceptional sweating in the summer and a touch of weight gain. i would recommend this medicine to anyone."