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Cannabis is a stimulant substance. It is a common drug of abuse. When taken it causes intense stimulation and it is known to worsen the symptoms of anxiety
disorders. You are also having anxiety disorder and this has potentiated the side effects of drug. The heaviness in head is due to cannabis only. I would advise you to please quit cannabis and take proper treatment of anxiety disorder. Both medicinal and non medicinal treatment is effective. Medicines of SSRI
group are very effective. Non pharmacological treatment like Behavior Therapy is also an effective treatment.
Dr. Seikhoo Bishnoi, MD