Doctor insights on:
Does Cetirizine Affects Fertility
Same and different: Both one and same thing antihitamine once a day pill generic vs no generic, both over the counter. Should be taken at night as it can make you sleepy. Try not to take every day every pill has side effects. ...Read more
Allergies and hives:
Zyrtec (cetirizine) is a new generation antihistamine that is FDA approved for relieving the symptoms of ::
Seasonal Allergic rhinitis (hay fever) from pollen in patients over 2 years old
Perennial allergic rhinitis: year round allergies in patients over 6 months old
Chronic Urticaria (hives) in those over 6 months old
It has been shown to prevent itching and decrease size of mosquito bites! ...Read more
Generic for Zyrtec (cetirizine):
The most common side effects of Cetirizine are sedation and dry mouth.
Children typically tolerate the sedative effects better than adults but parents have reported changes in personality and mood amongst my patient population under the age of 7 years. Overall Cetirizine is a very effective once a day antihistamine in the class of 2nd generation antihistamines. ...Read more
Close: Xyzal (levocetirizine) (levo-cetirizine) is the r-isomer, of zyrtec (cetirizine). Medications are usually a combination of r + s (called racemic). Typically only the r side contributes to the clinically meaningful action of the drug. So, the companies have been able to separate the active r side from the inactive s- side. This means it may be as or more effective at half the dose. ...Read more
Both antihistamines: Allegra (fexofenadine) and zyrtec (cetirizine) are both new generation antihistamines affecting h1 receptor. They are different compounds but essentially work the same way. They are both approved for allergic rhinitis and hives. Both come in various forms for treatment of children and adults. Time of onset for clinical relief of symptoms is about the same. ...Read more
Loratadine is weaker: When loradine (claritin) was studied the manufacturer selected the lowest dose that gave a response better than placebo but didn't have more side effects than placebo. This caused it to be a fairly weakly effective med. As it wasn't studied at higher dose I can't speak to safety of higher doses. Personally, I find zyrtec (cetirizine) to be much more effective but may be more sedating. ...Read more
Not recommended: The maximum daily dose recommended for zyrtec (cetirizine) is 10mg. Higher than this dose may cause serious side effects such as liver damage, seizures or low blood pressure. However, in certain situations higher than recommended dose may be warranted under physician supervision. The risks/benefits must be carefully weighed. ...Read more
Depends: All 3 of the mentioned new generation antihistamines (zyrtec, allegra, (fexofenadine) clarinex) are effective for treating allergic rhinitis and hives. What's interesting is that each individual person may respond better to one over the other. While every allergist probably has his/her favorite, truth is...They all work. If not happy with one, try a different one! ...Read more
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