Can non-drowsy Zyrtec make you tired?
Cetirizine is known as a non-drowsy antihistamine. That’s because it’s less likely to make you feel sleepy than sedating antihistamines, such as Piriton (chlorphenamine). Most people prefer to take a non-drowsy antihistamine instead of one that makes them drowsy.
Why does Zyrtec make me so sleepy?
The first-generation antihistamines can make you drowsy because they cross the blood-brain barrier, an intricate system of cells that regulates what substances pass into the brain.
Why is Zyrtec non-drowsy?
As antihistamines, they block histamine’s effects, as first-generation antihistamines do. But they don’t cross the blood-brain barrier as much as the older antihistamines, so they’re less likely to cause drowsiness.
Can non-drowsy allergy medication make you tired?
Non-drowsy antihistamines are generally the best option, as they’re less likely to make you feel sleepy. But types that make you feel sleepy may be better if your symptoms stop you sleeping. Ask a pharmacist for advice if you’re unsure which medicine to try as not all antihistamines are suitable for everyone.
Will Zyrtec keep you awake?
Zyrtec-D (cetirizine / pseudoephedrine) relieves allergies and congestion without causing daytime sleepiness, but it can keep you up at night.
How long is Zyrtec in your system?
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.
Can Zyrtec cause weight gain?
Evidence of Antihistamine Weight Gain A study published in the journal Obesity found an association between the use of antihistamines and obesity. 1 Of the almost 900 people studied, those taking antihistamines—such as Zyrtec and Allegra—were more likely to be overweight or obese than those not taking antihistamines.
What are the side effects of stopping Zyrtec?
Withdrawal Symptoms when stopping Zyrtec. On the downside the itchies and bad hives continued unabated. I was absolutely miserable and the days were just an itchy, painful blur. Sleep deprivation is a form of torture. Sleep deprivation and constant intense burning, itchiness brings a whole new dimension to torture.
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.
Why does Zyrtec make you tired?
Both Zyrtec and Claritin may make you drowsy or tired. For that reason, you shouldn’t take these medications if you also take muscle relaxers, sleeping pills, or other drugs that cause drowsiness. Taking them at the same time that you take sedating drugs can make you extremely sleepy.
Does Zyrtec Make you Sleepy?
While taking zyrtec, especially if you are older, you may experience dry mouth and accelerated dental caries among other (drowsiness, headache, constipation and miscellaneous other adverse effects). Upon discontinuing zyrtec, you may experience disabling generalized and severe itching without a rash or sometimes with a rash.