Allegra works within two hours and Zyrtec works within one hour. Several studies have found cetirizine (Zyrtec) to be more effective than fexofenadine (Allegra) at relieving symptoms of allergic rhinitis and urticaria, and it appears to have a longer duration of action.
Is cetirizine or fexofenadine better?
Cetirizine and fexofenadine reduced TSSC scores (p < 0.001) and individual symptoms (p < 0.05) more than placebo. However, cetirizine was more effective than fexofenadine (p < 0.05) for runny nose and sneezing (12 hours and overall), itchy/watery eyes (12 hours), and itchy nose/throat/palate (overall).
Can I take cetirizine and fexofenadine?
No interactions were found between cetirizine and fexofenadine. This does not necessarily mean no interactions exist. Always consult your healthcare provider.
Is cetirizine the same as Allegra?
The symptoms they treat
The main active ingredient in Allegra is fexofenadine. The main active ingredient in Zyrtec is cetirizine. Both of these drugs are antihistamines.
What is equivalent to cetirizine?
Cetirizine is a non-sedating antihistamine. It is similar to other second-generation antihistamines including loratadine (Claritin), fexofenadine (Allegra) and azelastine (Astelin).
What is the strongest fexofenadine?
There are three strengths of fexofenadine tablet available – 30 mg, 120 mg and 180 mg. The 30 mg strength is for treating hay fever in children aged 6-12 years; the 120 mg strength is for treating adults with hay fever; and the 180 mg strength is for chronic urticaria.29 мая 2020 г.
What are the side effects of fexofenadine?
Fexofenadine is classed as a non-drowsy antihistamine, but some people still find it makes them feel quite sleepy. Common side effects include headaches, feeling sleepy, dry mouth, feeling sick and dizziness.
Is it OK to take antihistamines every day?
Depending on your symptoms, you can take antihistamines: Every day, to help keep daily symptoms under control. Only when you have symptoms. Before being exposed to things that often cause your allergy symptoms, such as a pet or certain plants.30 мая 2020 г.
What is the best time of day to take fexofenadine?
Disintegrating fexofenadine tablets (such as Allegra ODT) should be taken on an empty stomach – one hour before or two hours after food.
How long does fexofenadine stay in your system?
FexofenadineClinical dataMetabolismHepatic (≤5% of dose)Elimination half-life14.4 hoursExcretionFeces (~80%) and urine (~10%) as unchanged drugIdentifiersЕщё 34 строки
What is the best antihistamine?
Sedaghat suggests taking a second-generation OTC antihistamine that’s less likely to cause drowsiness, such as fexofenadine (Allegra), loratadine, or cetirizine (Zyrtec). Compared with first-generation antihistamines, the second-generation ones are no more potent, but they are more expensive.
What is the strongest allergy medicine?
Our Top Picks
- Best Overall: Allegra Adult 24-Hour Allergy Relief at Amazon. …
- Best Prescription-Strength: Zyrtec Prescription-Strength Allergy Medicine Tablets at Amazon. …
- Best for Kids: Children’s Zyrtec Allergy Relief Syrup at Amazon. …
- Best Non-Drowsy: Claritin 24-Hour Allergy Reditabs at Amazon.
What is the most effective antihistamine?
If your allergies only appear sporadically – say when pollen count is high or you have that random encounter with your friend’s cat – fast-acting antihistamines will be your best bet. These include medications like Benadryl (diphenhydramine), Claritin (loratidine), Allegra (fexofenadine), and Zyrtec (cetirizine).7 мая 2018 г.
What is the safest allergy medicine to take?
Share on Pinterest Zyrtec and Claritin are safe for most people with minor allergies, but side effects can include headaches and dizziness. Claritin and Zyrtec are effective and safe for most people with minor allergies.
Is cetirizine the same as Benadryl?
Benadryl (diphenhydramine) is a first-generation antihistamine. First-generation antihistamines tend to cause more sedation and drowsiness and can impair coordination and driving. Zyrtec (cetirizine) is a second-generation antihistamine.
What is cetirizine used for?
Cetirizine is an antihistamine medicine that relieves the symptoms of allergies. It’s used to treat: hay fever. conjunctivitis (red, itchy eye)