For about 2 years, I have taken a half dose of Simply Sleep and it has worked wonders to not knock me out or leave me feeling drugged but to help me go back to sleep at night when I wake up. The last 2 months, its like I haven't taken it at all, even if I increase the dose. The only consistent change was taking Plaquenil. Is that an effect it can have? I know it does something to the metabolism....