Rhabdomyolysis and seizures: what to know

During a seizure, muscles may contract forcefully for an extended period. That effort can injure muscle cells and release their contents into the blood, producing rhabdomyolysis. The breakdown may affect the kidneys or disturb salts that help nerves and muscles work. A person may have soreness, swollen muscles, weakness, reduced urine, or unusually dark urine after the event. They may not notice these signs immediately, especially if they are sleepy or confused.

Once the seizure has stopped, place the person on their side, protect the head, and do not give food, drink, or tablets until they are fully alert. Call emergency services if the seizure lasts longer than expected, repeats without recovery, causes injury, happens in water, or breathing does not return normally. After recovery, urgent assessment can include blood and urine tests, kidney checks, and review of the seizure cause and medicines.

Seek emergency care for persistent confusion, breathing trouble, severe muscle swelling, profound weakness, very little urine, dark urine, fainting, or chest symptoms. Do not dismiss these as ordinary post-seizure soreness. A seizure-related muscle injury can evolve after the visible convulsions have ended.

Ask whether testing is needed for muscle injury, kidney function, and blood salts; whether seizure medicines need review; and which symptoms require immediate return. Ask how to record the timing, duration, and recovery of future episodes.