I have what was suspected to be a herniated disc L5-S1 because of low back pain, a numb toe and foot drop. I was prescribed Diclofenac Sodium. After a day of taking these I started to develop insane cramping of the buttock muscles and hamstrings which persisted for at least two weeks, I thought this was part of the nerve being irritated or compressed. It hurt like hell, couldn't walk for days. This condition cleared up in about three weeks (hence my doubt about it being a herniated disc). Two weeks ago I hurt my back again when putting on pants. Same story, really bad back pain, went to bed after taking diclofenac, bad muscle cramps start after a day. I quit the diclofenac after 2 days and started taking ibuprofen 400mg three times daily. The muscle cramps persisted, being at their worst in the morning after getting out of bed.
Last week I forgot to take the ibuprofen on two occasions and took the first pill at noon after which the cramps got really bad. The first time I thought this was coincidence but now I am not so sure. I have not been eating well and I probably don't drink enough water during the day, could this be perhaps be a reason for ibuprofen / diclofenac worsening or even causing these leg and buttock cramps? I now even start to suspect that I never had a herniated disc but an injury to the quadratus lumborum muscle and that the cramps brought on or worsened by the pain meds somehow damaged the sciatic nerve.