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Doctor insights on: Does Claritin Cause Drowsiness

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Can Claritin (loratadine) non-drowsy antihistamine still cause drowsiness?

Can Claritin (loratadine) non-drowsy antihistamine still cause drowsiness?

Yes: Claritin is a second generation antihistamine which causes much less drowsiness than first generation antihistamine, like benadryl (diphenhydramine). The number of people who feel drowsy on Claritin is so low that it is labeled "non-drowsy". But each of us is unique. I have plenty of patients who feel drowsy on claritin, especially petite women. ...Read more

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Dr. Ashraf Abdel Azeem
537 Doctors shared insights

Claritin (Definition)

Claritin is a non-sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


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Why would Claritin (loratadine) make someone drowsy?

Why would Claritin (loratadine) make someone drowsy?

Claritin (loratadine): Loratidine, while described as a non-sedating antihistamine, can still cause drowsiness in some individuals. It is still an antihistamine. ...Read more

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Does Claritin (loratadine) non-drowsy make you hyper?

Antihistamine: Antihistamines can still cause drowsiness even if it says, non-drowsy, especially loratadine. Paradoxical effects of hyperactivity can be a side effect of antihistamines, though it tends to happen mostly in the very young or old. If you took a decongestant with it, then that can also cause hyperactivity. ...Read more

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Non drowsy Claritin (loratadine) is making me hyper, why?

Individual variance: Any medication can produce non-typical effects on some of the population that is not seen in others. Claritin (loratadine) does not seem to cross into the brain in most people, allowing for a lack of sedation for most. However, all of us have some differences in how our body reacts to some medications ant this can be one of them. For you, the medication likely reaches your brain and causes stimulation. ...Read more

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Should I take non-drowsy Claritin (loratadine) at night or in the morning?

Should I take non-drowsy Claritin (loratadine) at night or in the morning?

Either: It can be taken either day or night. However Claritin (loratadine) d which contains a decongestant can keep some people up at night. ...Read more

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My 6mo old was prescribed loratadine/ambroxol. She seems very drowsy, why? And how long will it stay I her system?

My 6mo old was prescribed loratadine/ambroxol. She seems very drowsy, why? And how long will it stay I her system?

Mgt: If your baby is more drowsy/lethargic, not feeding well, please see your ED. This may not be related to the medications, but rather to an illness. The ambroxol should be discontinued until further evaluation is completed. For excessive mucus production, nasal saline drops and gentle suction is the only treatment advised in this age group, unless there is a tracheostomy or some other problem. ...Read more

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How come non-drowsy Claritin (loratadine) still makes you tired?

How come non-drowsy Claritin (loratadine) still makes you tired?

Claritin (loratadine): Hello, I have treated many people with allergy with antihistamines. Even though they are listed as non sedating, some people react to these medications in an unexpected fashion. Sedation may still occur and if this is present, I usually recommend using this medication if needed at night before sleep. It will still work for 24 hours and may help with allergy and sleep. ...Read more

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Loratadine makes me drowsy, should I try cetirizine to see if that doesn't do the same thing?

Loratadine makes me drowsy, should I try cetirizine to see if that doesn't do the same thing?

You can: Loratadine & Cetirizine are both in a class of medications known as non-drowsy long acting anti-histamines. Although they are in the same class, I still have patients that experience drowsiness (usually more from cetirizine); however, I would try it because everyone responds differently to the same medications. Take it before bed so if drowsy you can go to sleep anyway. ...Read more

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Since childhood I am very sensitive to desloratadine (makes me drowsy in an hour) while I am immune to loratadine. Will I ever outgrow this?

Since childhood I am very sensitive to desloratadine (makes me drowsy in an hour) while I am immune to loratadine. Will I ever outgrow this?

Unknown: Actually the desloratadine is associated with less somnolence than the loratadine on a general basis. Certainly side-effects that we experienced as children may not be present as adults but there is not was to say with certainty that you will "out grown" it. If loratadine helps your symptoms and gives you fewer side-effects stick with that! Good Luck! ...Read more

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Is non drowsy Claritin (loratadine) ok to take whike breastfeeding?

Yes: This is one of the best tolerated antihistamine preparations for breastfeeding.Transfer into milk is negligible as is effect on milk volume. ...Read more

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Have really bad nose congestion and I took one Claritin (loratadine) d non drowsy. I am starting to feel really tired, is this normal? Also, there isn't much relief

Yes but: Claritin can indeed cause drowsiness in a few people especially when the dose is doubled. On the other hand, th decongestant part (D) tends to keep people awake and thus your reaction is not common but not totally unexpected. We rarely use oral decongestant nowadays given that nasal steroid /nasal antihistamine are more effective with far less side effects. ...Read more

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I just purchased 24 hour Claritin D Non-Drowsy for allergies. Should I take this in the AM or PM? Can I consume alcohol while taking Claritin D?

I just purchased 24 hour Claritin D Non-Drowsy for allergies. Should I take this in the AM or PM? Can I consume alcohol while taking Claritin D?

A.m.: Because most of the decongestant is released during the day, you may have insomnia if you take it at night- even then the lingering effect of the decongestant may still disrupt your sleep. Yes there is no problem with alcohol in moderation. ...Read more

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My throat feels dry, have 37.5 temperature and sleepiness, after having loratadine 10 mg. And phenylephrine 5mg. Together. Is that normal?

My throat feels dry, have 37.5 temperature and sleepiness, after having loratadine 10 mg. And phenylephrine 5mg. Together. Is that normal?

Can be related but: The 37.5 temp may be normal unless you have an underlying illness as the reason to take the meds. Temperature normall ranges are like a Bell Shaped Curve and you are in the normal curve. Loratidine is an antihistamine and this could dry you and make you sleepy. The phenylephrine may actually have a different effect. In essence this all appears normal and physiological. ...Read more

Dr. Marsha Davis
425 Doctors shared insights

Drowsiness (Definition)

Drowsiness = feeling sleepy/ feeling ...Read more


Dr. Masoud Sadighpour
269 Doctors shared insights

Sleepiness (Definition)

Sleepiness = feeling the ...Read more