I use conkast(montelukast sodium) 10mg in pakistan for allergies and mild asthma. can i take it in pregnancy as well?

Yes: This drug is considered safe for the fetus when used in pregnancy.

Probably: It is a category b in pregnancy, which means it is pretty safe. Studies in animals have not shown any harm to fetuses. No one does studies in pregnant human females. In short, if you depend on it for your breathing, take it as mother's lack of oxygen can harm the fetus. If you can live without it, don't take it while pregnant.