Call your doctor ASAP to make adjustments in your
treatment. I have never heard
of twitching with
Singulair, but it is a side effect
of other asthma meds.
Be sure to let your doctor know that you have stopped taking Singulair this week and watch for signs of uncontrolled asthma - increased use of inhaler, coughing, sighing... There are a lot of subtle signs that people miss.
You do need to be off the med, but be careful.
Take care and I am glad you are feeling better.