Intranasal Anesthetic for Chronic Migraine

This trial explores whether lidocaine, an anesthetic, can reduce the pain of Botox® injections for chronic migraines. Participants will have a small piece of cotton with lidocaine placed in their nostrils before receiving injections to assess its effect on discomfort. The study will compare this to using cotton soaked in saline (salt water) as a placebo. Individuals with chronic migraines, experiencing at least 8 headache days per month or significant pain affecting daily life, might be suitable for this trial. As an unphased trial, it offers participants the chance to contribute to innovative research that could enhance comfort during migraine treatments.

The trial information does not specify whether you need to stop taking your current medications. It's best to discuss this with the trial coordinators or your doctor.

Research has shown that intranasal lidocaine is generally safe. In studies, most people experienced only mild side effects, such as a bad taste in the mouth for about 21% of users and nasal discomfort for around 4%. These side effects occurred more frequently than in those who did not use lidocaine. However, no serious problems were reported. Another study found that up to 49.4% of users experienced local irritation, but again, no major issues occurred. Overall, while some mild side effects might happen, intranasal lidocaine is well-tolerated and usually does not cause serious problems.¹²³⁴⁵

Unlike most treatments for chronic migraine, which typically involve oral medications or injectable therapies, this new approach uses intranasal 4% lidocaine. This method of delivery is unique because it offers a non-invasive, rapid action directly targeting nasal pathways that may be involved in migraine mechanisms. Researchers are excited about this treatment because it could provide fast relief without the systemic side effects often associated with traditional oral or injectable migraine medications. Plus, the added flavor in the lidocaine solution might improve patient experience and adherence.

Research has shown that lidocaine in a nasal spray can help alleviate migraine pain. In some studies, it reduced headache symptoms by at least half within 15 minutes. Other studies found that 38% of patients experienced pain relief within two hours. It also appears to reduce the need for additional pain medication. In this trial, participants will receive either intranasal lidocaine or a saline placebo to evaluate its effectiveness. While experts continue to discuss lidocaine's efficacy for migraines, many findings suggest it can be a helpful option.¹³⁵⁶⁷