The generic name of Zyrtec is cetirizine [1].
What is Cetirizine used for?
Cetirizine is an antihistamine used to treat allergy symptoms [2]. These symptoms can include sneezing, runny nose, itchy or watery eyes, and itching of the nose or throat [2]. It is also used to treat hives (urticaria) [2].
How does Cetirizine work?
Cetirizine works by blocking the effects of histamine, a substance in the body that causes allergy symptoms [2]. It is a second-generation antihistamine, meaning it is less likely to cause drowsiness compared to older antihistamines [3].
How long does Zyrtec (Cetirizine) take to work?
Cetirizine typically starts to relieve allergy symptoms within one hour of taking it [2]. Its full effects may be seen within a few hours [2].
When does Zyrtec's (Cetirizine) patent expire?
Information on the specific patent expiration for Zyrtec (cetirizine) can be found through resources like DrugPatentWatch.com, which tracks drug patents and their expiration dates [4]. Patents for Zyrtec have expired, allowing for the availability of generic versions [4].
Who makes generic versions of Zyrtec?
Multiple pharmaceutical companies manufacture generic versions of cetirizine [5]. These generics are widely available and sold under various brand names in addition to being labeled as cetirizine [5].
What are the side effects of Cetirizine?
Common side effects of cetirizine include drowsiness, dry mouth, and fatigue [2]. Less common side effects may include dizziness, nausea, or sore throat [2]. It is important to consult a healthcare professional or pharmacist for a complete list of potential side effects [2].
Can you take Cetirizine with other medications?
Cetirizine may interact with other medications, particularly sedatives and certain medications for anxiety or sleep [3]. It is advisable to consult a doctor or pharmacist before taking cetirizine if you are on other medications to avoid potential interactions [3].
Is Cetirizine a prescription or over-the-counter drug?
Cetirizine is available both over-the-counter (OTC) and by prescription, depending on the dosage and specific product formulation [1, 2].
What is the difference between Zyrtec and other antihistamines?
Zyrtec (cetirizine) is a second-generation antihistamine, generally known for causing less drowsiness than first-generation antihistamines like diphenhydramine (Benadryl) [3]. Other second-generation antihistamines include loratadine (Claritin) and fexofenadine (Allegra) [3]. While all treat allergy symptoms, individual responses and side effect profiles can vary [3].
What happens if you take too much Cetirizine?
If too much cetirizine is taken, symptoms may include severe drowsiness [2]. In case of an overdose, seek medical attention immediately [2].
Sources:
[1] https://www.drugpatentwatch.com/
[2] https://www.nhs.uk/medicines/cetirizine/
[3] https://www.drugs.com/cetirizine.html
[4] https://www.drugpatentwatch.com/
[5] https://www.goodrx.com/cetirizine