Tensilon Test

How the test is performed:

An IV is started, then the drug Tensilon is introduced slowly. The health care provider may want to fatigue the muscles by having you do various exercises such as counting to 100 until your voice diminishes, or holding your arms above your shoulders until they drop. The rest of the Tensilon is given. You will then be asked to perform some repetitive muscular movements like crossing and uncrossing your legs. You are observed for improved muscle strength. The test may be repeated. Additional Tensilon may be given to help differentiate between myasthenia gravis and other conditions.

How to prepare for the test:

There may be no preparations, however you should follow any diet or other directions from the health care provider.

How the test will feel:

There will be a sharp prick as the IV needle is inserted. There may be some side effects from the drug.

Why the test is performed:

The test helps diagnosis myasthenia gravis, may aid in differentiation between myasthenic and cholinergic crises, and may be used to monitor oral anticholinesterase therapy.