I took half of a 20mg Relpax and it helped after taking 800mg of Ibuprofen. The Ibuprofen did take away some of the initial discomfort, however it still hung around and I had a concert to perform that night and needed to be in top form. Half a Relpax was all that I needed and I sang my heart out and the next day I did not have another migraine from the singing. I thought it could have been from the concert the night before, however the weather took a drastic change and it became clear late afternoon after I took the relpax. Glen went to the drugstrore and filled my prescription for this drug cause I had no more samples available to me. This morning I'm just a bit stiff and little achey from the performances for the last two nights. I put out a lot of energy when I sing and do shows.