The oldest group of antihistamines (first-generation ... antihistamines in combination with other drugs. For example, ...

And so these are where antihistamines come in and generally are the first line of treatment ... In a lot of the cases, you see combinations of antihistamines and decongestants.

However, if nasal congestion or a stuffy nose is one of your main symptoms, decongestants ... before taking an antihistamine. Older types of antihistamines, known as first-generation ...