Hello! I usually take Ibuprofen for my menstrual cramps. My mother says I should visit my doctor first but since Ibuprofen works well for me I don’t see the reason. I don’t feel any of the possible side effects I read about in the instructions. But, sometimes when I take it I feel tired after an hour or two and I just want to go to sleep. I don’t know if this is normal and usual reaction when taken Ibuprofen.