The most common side effects of TMS are discomfort at the site of treatment during the treatment sessions and a mild headache for a few hours following the sessions. Occasionally patients experience discomfort in the eye, teeth or jaw and typically alleviated with over the counter analgesics.
Some patients may experience increased anxiety and sleep difficulties. All of these usually decrease following the first week of treatment.
TMS is a loud treatment, wearing appropriate ear plugs during sessions protects hearing. There is a very small risk that some patients will develop seizures during treatment sessions. The probability of a patient without a history of epilepsy developing seizures is 1 per 60,000 treatment sessions. This is less than the risk of seizures developing in patients who take antidepressants.