The best medicine for appetite and weight gain are megestrol acetate also called Megace, which is an appetite stimulate often used in cases of severe weight loss from conditions like AID and HIV or cancer.
Other medicines that are approved for use for appetite and weight gain are mirtazapine and Marinol.
The drugs that cause massive weight gain are epilepsy medications, steroid medications and antidepressant medications.
The epilepsy medications that can cause massive weight gain are gabapentin, carbamazepine, divalproex and valproate.
The antidepressant medications that cause massive weight gain are sertraline, mirtazapine, citalopram, escitalopram, paroxetine, imipramine and amitriptyline.
The steroid medications that can cause massive weight gain are birth control pills and prednisone.
Some medications cause weight gain by affecting the body's metabolism, appetite, or how it stores and absorbs nutrients
Certain medications increase your appetite which can cause you to eat more foods and cause weight gain.
And certain medications can slow down your body's metabolism which means calories are not burned as quickly which leads to weight gain.
Common drugs that cause unwanted weight gain include corticosteroids, antidepressants, diabetes medications such as insulin or those containing sulfonylureas, some heartburn drugs, hormone therapy/contraceptives, and anti-seizure drugs such as Depakote.
Allergy medications can also sometimes cause weight gain.
Over-the-counter allergy medications block the action of histamine, a chemical your body makes that causes many of the symptoms of allergies.
Blocking histamine with an antihistamine like diphenhydramine may lead to weight gain.