Constipation is more common with first-generation antihistamines and/or if you take a decongestant, Dr. Gawchik says. To ...

First generation antihistamines usually work for about ... For example, Zyrtec-D combines the antihistamine cetirizine with ...

Some contents of the cold and flu medicine can harm the baby Read on to know why pregnant women should avoid cold medicines ...

In vitro tests have demonstrated that second-generation antihistamines have improved H 1-receptor specificity and a slower dissociation rate compared with first-generation antihistamines ...

Older types of antihistamines, known as first-generation antihistamines ... you might want to consider a decongestant in addition to antihistamines. Decongestants target the relief of a stuffy ...

These first-generation antihistamines commonly cause drowsiness ... or other medications like decongestants.