I am very susceptible to this type of pain when taking medication, especially with steroids and antibiotics, but I haven't had issues with Imitrex other than it not working so well on my migraines. I was reading an article/study from 2000 that muscle and joint pain can result - as a short-lived side effect - from taking Imitrex. https://pubmed.ncbi.nlm.nih.gov/10817445/#:~:text=Sumatriptan%20succinate%20(Imitrex)%20is%20a,and%20muscle%20aches%20and%20pains. The best thing to do is discuss this again with your doctor and as Amanda stated see if there is another medication that would work better for you. I am using Maxalt now instead of Imitrex and it seems to help me better. Unfortunately, you've got to find what works best through trial and error, which takes time. Rebecca (comm advc)