some anti depressants can cause weight gain. switching drugs may make difference.
exercise will help and minimizing carbohydrates. lots of water and enough sleep.
hope you'll feel fine.

coconut oil can help decrease both body weight and body fat. Swapping out vegetable oils for coconut oil in your cooking is a simple way to add another fat-burning food to your diet.

it all about what you eat and exercise can help on burning what you eat.
energy in = energy out + energy stored.
you may want to increase your energy out or decrease the energy in for your stored energy(fats) to be consumed.

protein intake depend on your body weight, if loosing weight you may want to decrease your carb intake.