Is there anything that can supress appetite?

Well, I have a friend who is really overweight.
She wants to cut down her meals but has having a hard time doing it. She keeps on making rules to herself that she would never eat too much but could not help it specially if the food is really good. She had all those stuff for losing weight, herbal tea, pills, lotions and everything but still it doesn't work. she has no money to have a lypo suction as what others did. She just want an appetite supressant to help her reduce her intake and may help her reduce weight. Exercise dont work for her.

As usual, maybe others had some idea.

she just need help. she felt frustrated already. Thank you very much.