What is the original brand name of cetirizine?
What is the original brand name of cetirizine?
Cetirizine, sold under the brand name Zyrtec among others, is a second-generation antihistamine used to treat allergic rhinitis (hay fever), dermatitis, and urticaria (hives). It is taken by mouth.
What is the medication Cetirizine Hydrochloride used for?
Cetirizine is an antihistamine that reduces the effects of natural chemical histamine in the body. Histamine can produce symptoms of sneezing, itching, watery eyes, and runny nose. Cetirizine oral is used in adults and children to treat cold or allergy symptoms such as sneezing, itching, watery eyes, or runny nose.
Does cetirizine expire?
Antihistamines, one of the main types of allergy medicine, can be safe to use after the expiration date. For over-the-counter medicines like Claritin and Zyrtec, the listed expiration dates are typically around two and a half years after manufacturing.
Can you buy cetirizine over the counter uk?
Cetirizine is available on prescription, but you can also buy it from pharmacies and supermarkets. It comes as tablets, capsules and as a liquid that you swallow.
What’s the difference between cetirizine and cetirizine hydrochloride?
They both contain cetirizine hydrochloride, which is used to treat allergy symptoms like sneezing, watery eyes, and an itchy, runny nose. However, Zyrtec-D has an added decongestant. Zyrtec is classified as an oral antihistamine….Conditions treated by Zyrtec and Zyrtec-D.
| Condition | Zyrtec | Zyrtec-D |
|---|---|---|
| Hives | Yes | No |
Can you take expired allergy medicine?
It may be fine to take an allergy medication that’s a month past its expiration date. But there is some risk in taking a heart rhythm medication that, if ineffective, could lead to an unstable and dangerous heart problem.
Is cetirizine a second generation antihistamine?
Cetirizine. Second-generation antihistamines like cetirizine are less able to cross the blood–brain barrier and therefore have diminished effects on the central nervous system compared to first-generation drugs. Because of this, they are less likely to cause drowsiness or memory impairment .
What is the pharmacologic mechanism of action of cetirizine?
Pharmacodynamics. Cetirizine acts as a highly selective antagonist of the histamine H 1 receptor. The K i values for the H 1 receptor are approximately 6 nM for cetirizine, 3 nM for levocetirizine, and 100 nM for dextrocetirizine, indicating that the levorotatory enantiomer is the main active form. Cetirizine has 600-fold or greater selectivity
What is the pharmacokinetics of levocetirizine?
The oral bioavailability of cetirizine is at least 70% and of levocetirizine is at least 85%. The T max of cetirizine is approximately 1.0 hour regardless of formulation. The pharmacokinetics of cetirizine have been found to increase linearly with dose across a range of 5 to 60 mg.
What is the oral bioavailability of cetirizine?
Cetirizine is rapidly and extensively absorbed upon oral administration in tablet or syrup form. The oral bioavailability of cetirizine is at least 70% and of levocetirizine is at least 85%.
