Two antihistamines, including Zyrtec, are under warning by the FDA after people reported “severe itching” after ceasing long-term use of the drugs—what to know.

A: Levocetirizine (Xyzal) was once a prescription-only antihistamine. It went over-the-counter in 2017. Common side effects include fatigue, sleepiness, sore throat and dry mouth.

Compared with placebo, patients in the levocetirizine group experienced an additional mean 6.5 (95% CI 3.8, 9.3) pruritus-free days per month (p < 0.001).

A. Levocetirizine (Xyzal) was once a prescription-only antihistamine. It went over-the-counter in 2017. Common side effects include fatigue, sleepiness, sore throat and dry mouth.

Background: Exercise induced bronchoconstriction (EIB) is common in elite athletes. Eucapnic voluntary hyperventilation (EVH) is a laboratory test recommended for the identification of EIB in athletes ...

The FDA decided to issue this warning after identifying 209 cases worldwide -- 180 cases for cetirizine, 27 for levocetirizine and two for both -- of this particular side effect reported between ...

The FDA identified 209 cases worldwide (197 in the U.S.) of new-onset pruritus after cetirizine/levocetirizine withdrawal between April 2017 and July 2023.

Objective To compare the effects of treatments for mild or moderate (that is, non-severe) coronavirus disease 2019 (covid-19). Design Systematic review and network meta-analysis. Data sources Covid-19 ...