Possible side effects of a myelogram include headache, nausea and vomiting, according to WebMD. The headache can last for as long as 24 hours. Although it only happens rarely, there is a risk of seizure after insertion of the dye in the spinal canal or if the dye moves to the brain.
Other rare but possible side effects associated with a myelogram include inflammation of the spinal cord, weakness and numbness, states WebMD. A myelogram may cause a patient to lose control of his bladder or bowels, and it may cause paralysis.
During the myelogram procedure, a patient may experience a metallic taste in the mouth, notes WebMD. The dye can cause a patient to feel warm and flushed, and a patient may feel sick to his stomach or have a headache during the procedure. The needle used to numb the skin may cause a quick stinging sensation, and there may be a rapid, sharp pain that moves down the buttock or leg when the needle enters the spine.
There is a minor chance that an infection may occur at the injection site, states WebMD. Although it is a rare occurrence, it is possible for the hole in the sac near the spine not to close correctly, which can lead to spinal fluid leakage. An allergic reaction to the dye is possible, but the health care provider provides a medication to stop it. People who take metformin for diabetes may be at risk of kidney issues.