To stop a runny nose due to allergies, your best bet is to take an ... But overuse of decongestants can cause jitteriness and increased blood pressure. Doctors recommend using decongestants ...

Phenylephrine works by constricting the blood vessels in the nose ... so begin using them before allergies stuff your nose. Taking antihistamines like Claritin (loratadine), Zyrtec (cetirizine ...

Q: My nose is stopped up more than ... oral decongestants like Sudafed can cause high blood pressure, high heart rates and difficulty sleeping. An allergy specialist can help you both identify ...