Stopping These Medications Could Trigger Severe Itching
The FDA warns that stopping long-term use of allergy medications cetirizine (Zyrtec) or levocetirizine (Xyzal) may cause rare but severe itching, with most cases resolving upon restarting or tapering the medication. The cause is unknown, but a causal relationship is suspected, prompting a revision of the medication labels to include this risk.