Quick Answer: How Quickly Does Zyrtec Work?

Is it safe to take Zyrtec every day?

Can be taken once a day.

May be given daily on a regular basis when allergens are most prevalent (such as during spring or summer).

Zyrtec does not appear to interact with many drugs (theophylline slightly decreased the clearance of Zyrtec).

Zyrtec has been demonstrated to be safe in children older than 6 months..

Can Zyrtec help with anxiety?

Vistaril (hydroxyzine pamoate) and Zyrtec (cetirizine hydrochloride) are antihistamines used to treat symptoms of allergic reactions such as itching, runny nose, watery eyes, and sneezing. Vistaril is also used as a sedative to treat anxiety and tension, or to control nausea and vomiting.

How long does it take to get Zyrtec out of your system?

The elimination half-life of Zyrtec is between 8 to 9 hours. It takes approximately 5.5 x elimination half-life for a medicine to be cleared from your system. For Zyrtec this is 5.5 x 9 hours which is about 2 days.

Is it better to take Zyrtec at night or in the morning?

Cetirizine can be taken at any time of the day. In most people it is non-sedating, so they take it in the morning. However, a percentage of people do find it to be sedating so if it does make you drowsy it is best to take it in the evening. Cetirizine can be taken with or without food.