After five days my hot flushes returned, ringing ears, strange mo...

After five days my hot flushes returned, ringing ears, strange morbid mood, but the big clincher was the MONSTER headaches like a 'high blood pressure head ache', would stretch in bed when moving especially around 4-5am and wham the headache would pound/bound. Headache would calm down if I got up and had coffee. After 4 days I started to get worried and stopped Singulair after 5th 10mg dose, and now two days later headache, jaw pain, pain in upper shoulder muscles and at C-7 spinal vertabrae are all gone and I'm not so over whelmed or dizzy. What was good? I did not have to use my inhaler for those days, but this certainly is not a 'magic bullet' if you suffer with symptoms that are so dramatic and scary! Do they prescribe too high a dose?, should it be every other day or once a week? Are they really certain about interaction with other medications and vitamins etc? I do not think I will try it again, I felt like my headache was on the verge of a CVA! [cerebral vascular accident or stroke!] From a Canadian who was given a prescription i now cannot use.......