10 May 2011
You can take them together. Singulair is Montelukast sodium which is a leukotriene receptor antagonist and Claritin is Loratidine which is a piperidine antihistamine. Although they generally have a lower incidence of drowsiness than typical antihistamines they can still cause drowsiness and fatigue which is probably a little more pronounced when taking them together. Speak to your Dr about the drowsiness and he may be able to adjust the dose.
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