I have had abdominal pain on my left side when I am standing for about a week. The pain goes away as soon as I sit down or lay down. The area with pain is tender to touch. No fever, no nausea and no redness. Doctor recommended to take Flexiril. So far, there are no changes in pain after taking Flexiril. I am curious to know if anyone in this forum has had the same problem or taken Flexiril for muscle relaxant. Thanks.