Greetings - I have been taking Singulair for just over one week -...

Greetings - I have been taking Singulair for just over one week - since I have moved to a different town my asthma has been really bad - I have been visiting hospital once a week and using Flovent and Ventalin. I have not had a problem with asthma (except occassionally from exercise or cold air) for over 10 years. I am not or have not been on any drugs (not even aspirin) ecxept ventalin (only about a dozen puffs a year) for many many years. Since I have started the sungulair as well as symbicort inhaler I have been able to breath fine (first time in 4 months), however I have had extreme cramping in hands and feet and constant backache in lower back. My whole body is weak and sore and I am feeling fuzzy headed. It cannot be a coincidence, unless it is the symbicort, it must be the singulair!