Any interactions plaquenil methotrexate motrin800 Tylenol500 folic acid prilosec aspirin lopressor cartia imdur ambian singulair xyzal (levocetirizine) melatonin?

Too many. You are taking so many drugs that it is difficult to tell whether drug interaction may occur. Even if you run a profile in Epocrates , it is impossible to tell whether a combination with another drug may lead to interaction. Thus you will require close monitoring by your doctor and be on the lookout for any adverse effects.