Stomach pains, nausea and vomiting, skin itching. My skin started...

Stomach pains, nausea and vomiting, skin itching. My skin started itching the day after I started taking Singulair. Stomach pains started two days later, and progressed to vomiting the following day. I stopped taking Singulair because I couldn't keep it down; when I felt better the following day, I took it again - and started feeling worse within a few hours. I called my doctor and he said it sounded like I was having an allergic reaction to the drug and took me off it immediately.