M.H.
I've never taken it but I have heard that it messes with your serotonin levels. Serotonin regulates your sleep patterns along with other things. Any kind of pharmaceutical (synthetic drug) works by changing or bypassing the natural process. Sometimes you have to detox to get it our of your system.
My husband had tried almost every diet and always gained his weight back plus some with a vengeance. When I actually got him healthy, his weight started dropping off. He took an absorbable multivitamin/mineral complex, with no activity change and no diet change and he lost 110 pounds. He's kept it off for almost five years now.
You need to get your body back to a baseline of good health. When nutrition actually absorbs, the body will not hold extra weight. If you'd like to talk, I'll be glad to help. Other than my husband, I helped his best friend lose 50 pounds and my sister in law lose 15. Absorbing, not just ingesting, nutrition really is the key.
God bless,
M.