Can I take betahistine and aerius?

Yes, betahistine and Aerius (desloratadine) can generally be taken together, as they do not have known significant interactions. Betahistine is used primarily for vertigo and Meniere's disease, while Aerius is an antihistamine used for allergy relief. However, it's always best to consult your healthcare provider before starting any new medications to ensure they are appropriate for your specific health situation.