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You have Bipolar Disorder
for about 14 years and you are on Resperidone and Sodium Valporate since many years. Just for your knowledge both drugs are known to cause sedation. And when a doctor prescribe these medicines he warn his patients to not to drive after taking these drugs. But you have been taking these drugs since many years and are not complaining of sedation. You are stable since last 10 years.
One thing that can be done is visit your psychiatrist
and take opinion regarding tapering these drugs and then stopping if he feels so. But think about this only after consulting your psychiatrist.
In usual evaluations tests for these drugs are not done. But as per opinion you should tell them about this disorder if stigma is only problem.
Dr. Seikhoo Bishnoi