What medications cause weight gain?

According to health encyclopedia, the medicines that may cause you weight gain are:

What medications cause weight gain? 1 Medicines for Diabetes such as Insulin and Sulfonylureas.
What medications cause weight gain? 2 Antipsychotic medicines such as Haloperidol and Clozapine.
What medications cause weight gain? 2 Antidepressant medicines such as Paroxetine and Sertraline.
What medications cause weight gain? 2 Epilepsy medicines like Valproate and Gabapentin.
What medications cause weight gain? 2 Steroid hormone medicines like Prednisone or Birth control pills.
What medications cause weight gain? 2 Blood pressure reducing medicines like Propranolol and Metoprolol.

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