I've been taking Huperzine A for about three weeks together with Vinpocetine and Alpha GPC. All to help with my mild Alzheimer's. But I've noticed in the last two weeks that I've felt very "dragged out". Is there anything in the interaction of the three supplements or about Huperzine A in specific that might be the trouble? (I'm taking 200 MCG of Huperzine A, 5 milligrams of Vinpocetine, and 300 milligrams of Alpha GPC twice a day with meals.)