Elizabeth is taking many medications at once. She is experiencing blurred vision, orthostatic hypotension, and dizziness. Since she's always sucking on hard candies, this it is safe to say she has dry mouth also. What Elizabeth is experiencing are anticholinergic effects from one of her medications, or a drug interaction from them. There are also many other problems with the medications Elizabeth is taking.

First, Elizabeth is taking Diphenhydramine, an antihistamine. This drug interacts detrimentally with alot of the other drugs she is taking. It is not to be taken with tricyclic antidepressents because together they with heighten any anticholinergic effects. Elizabeth is experiencing these effects. The antihistamines also react with the effects of Elizabeth's prescription of Norpace, Dalmane, Haldol, and Riperdal. Secondly, there is no known reason why Elizabeth should be taking 25 mg of Diphenhydramine three times daily. Elizabeth should be taken off the Diphenhydramine immediately. It...