I am a 75 yr old Woman and am taking Namenda to slow down dementia as well as taking levothyroxine after having thyroid surgery. I am having many of the side effects that are identical to both which may be compounding the effects such as: weight gain, blood in Uren, itching head, lip puckering, tongue snaking, hallucinations, holding breath for about 10 seconds before exhaling, insomnia, swallowing without the aid of a fluid. and more. Q. what might an alternative be.