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How long does it take for Zyrtec to wear off?
Official Answer. 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.
Does Zyrtec really last 24 hours?
How long does ZYRTEC® last? ZYRTEC® provides 24-hour relief, all day and all night.
Can I give my child Zyrtec every day?
Adults and children 6 years and over: 5 mL or 10 mL once daily depending upon severity of symptoms; do not take more than 10 mL in 24 hours. Adults 65 years and over: 5 mL once daily; do not take more than 5 mL in 24 hours. Children 2 to under 6 years of age: 2.5 mL once daily.
Is there something stronger than Zyrtec?
If you need an allergy medication stronger than Claritin, Allegra, or Zyrtec, you might consider Benadryl or chlorpheniramine. While they do relieve respiratory allergy symptoms quite well, they work slightly differently from and generally cause more side effects than second-generation antihistamines.
How long does it take to get Zyrtec out of your system?
How long does it take for zyrtec (cetirizine) to be out of your system? Effects of Zyrtec (cetirizine) The half-life of Cetirizine (the time it takes for your body to get rid of half of the drug) is about 8 hours. The vast majority should be gone within about 24 hours. HealthTap does not provide medical advice, diagnosis, or treatment.
When is the best time to take Zyrtec?
Official Answer. 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.
What are the long term effects of Zyrtec?
Zyrtec can lead to harmful side effects that may require immediate medical help. According to Drugs.com, these side effects include: You may also experience vision problems, decreased urination, weakness and trouble sleeping. Zyrtec is also associated with causing gastrointestinal (stomach or intestinal) problems.
How long is Zyrtec good after expiration date?
Allergy medicine like Claritin, Zyrtec, and other antihistamine tablets typically expire after about two years. Allergy medicine expires, but it may still be effective for up to two or more years after the expiration date.