Weight loss with little effort is not plausible

My weight has been fluctuating like crazy lately. Since I’ve started my medication my appetite has taken a dive. I never want to eat. I either feel hungry and want to eat but the thought of food nauseates me. It’s a pain because food SOUNDS good until I get close to eating. I’ve lost like 6 lbs in a week and a half. I won’t complain because I certainly could use it. I know some people use diet pills like Alli but that really doesn’t help because you have diarrhea constantly and once you eat aga