A couple of days: Singulair (montelukast) is a relatively fast acting medication and one should see a benefit within a few days.
Answered 6/22/2016
5.9k views
2 hours: Singular can begin having a positive effect within 2 hours.
Answered 11/4/2012
5.9k views
5 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question