My wife (66) was using salbutamol inhaler for the last 10 years b...

My wife (66) was using salbutamol inhaler for the last 10 years being a bronchial asthmatic. Even prior to that, she was being treated with a combination of theophylline, cortisones . In 2001 she was diagnosed to be suffering from OCD and citalopram 20 mg was prescribed. With significant improvement, the dosage was reduced to citalopram 10 mg, though we lowered the dosage only in December 2007. However, during the last month, when she had to be admitted in the hospital for a stomach virus the doctors prescribed MONTELUKAST SODIUM 10 MG combined with lEVOCETIRIZINE 5 MG. . Dramatically,montelukast had a dramatic effect in that my wife never used the salbutalmol inhaler for well over 2 months, about which we were very happy. But the worst was yet to come. During the last few days, she again showed symptoms of the dreaded OCD once again, and she suffered like anything. On contacting a well known doctor, we were advised to stop MONTELUKAST and asked to continue citalopram (though escitalopram instead of citalopram ) along with clonozepam 5 mg to be tapered down every week for about a month. I would like to be advised from a doctor whether (a) discontinuance of Montelukast will be able to bring back normalcy from OCD of course with citalopram or escitalopram. and (b) whether montelukast can be abruptly stopped. For the time being, we have reduced the dosage of montelukast from 10 mg to 5 mg. PLEASE ADVISE US.