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Doctor insights on: Claritin Not Working

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My 6yo son has seasonal allergies. 10mg of 24hr Claritin (loratadine) quits working for him after approx 12hrs. Can I give him a 2nd 10mg dose?

My 6yo son has seasonal allergies. 10mg of 24hr Claritin (loratadine) quits working for him after approx 12hrs. Can I give him a 2nd 10mg dose?

No: Don't double up on antihistamines, and refrain from self medicating after a certain point. He needs to be evaluated by his doctor/allergist, check aaaai. Org or acaai. Org for an allergist in your area, best wishes best wishes

Dr. Ashraf Abdel Azeem
528 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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Had herpes 1 &sinus infection @ same time. Not sure what came 1st. Sinus turns into acute. Antibios n Claritin (loratadine) not working. Could this be herpes releated?

Herpes simplex: It is unlikely that the herpetic outbreak was a cause of sinus infection, but rather that any form of infection may trigger recurrences of herpetic lesions. The treatment of your sinusitis might benefit from use of saline irrigation with a Neti-pot, decongestants, and a steroid nasal spray. If these do not work you need to see an ENT doctor as soon as feasible. Good luck.

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Is it possible for Claritin (loratadine) to stop working for a person after a lot of use?

Is it possible for Claritin (loratadine) to stop working for a person after a lot of use?

Sort of: In general, if allergy medications cease to control symptoms, it's not that the medication has gotten less effective, but rather that allergies have gotten worse. Antihistamines don't lose effectiveness with regular use and one is not likely to be tremendously more effective than another.

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Been having a runny nose bad cough especially at night, Claritin (loratadine) hasn't been working. No fever, no chills, just cough and runny nose. What should I do?

Been having a runny nose bad cough especially at night, Claritin (loratadine) hasn't been working. No fever, no chills, just cough and runny nose. What should I do?

See doctor: Post-nasal drips is likely the most common cause for a chronic cough but you will need to be checked out for asthma also. Nasal steroid is usually more effective than Claritin in reducing the nasal symptoms -> improvement in your cough if asthma is not present. If your nasal discharge is often discolored, then sinusitis needs be ruled out.

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What should I do if loratadine isn't working?

What should I do if loratadine isn't working?

Try another medicine: Fortunately there are several good over the counter antihistamines besides loratadine. If the over the counter medicines do not help then see a doctor for prescription medicine. An allergist can help identify what triggers your symptoms and find the best treatment.

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Is 20mg of loratadine safe to take if 10mg is not Working?

Is 20mg of loratadine safe to take if 10mg is not Working?

Not unsafe: But what are you treating? If it isn't working at the regular dose for whatever problem, you'd better see your doctor, best wishes

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I just took a Claritin (loratadine) D and I feel as if it's not working, can I safely take a benedryl at this point? Its been about 2 hours since the Claritin (loratadine) D.

I just took a Claritin (loratadine) D and I feel as if it's not working, can I safely take a benedryl at this point? Its been about 2 hours since the Claritin (loratadine) D.

Ok: Other than a potential for more pronounced drowsiness, dryness, blurred vision and the other side effects of antihistamines it is unlikely to cause any serious adverse effects. I hope you feel better in the morning.

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I took a Claritin (loratadine) and it is not working can I take an allegra before 24 hours?

I took a Claritin (loratadine) and it is not working can I take an allegra before 24 hours?

Yes: But if you continue to have bothersome symptoms despite taking two 24-hour antihistamines in one day, you should see your physician for further advice.

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I have been taking Claritin (loratadine) d everyday for allergy problems. Not really working. What should I do?

I have been taking Claritin (loratadine) d everyday for allergy problems. Not really working. What should I do?

See an allergist: You should definitely see a board-certified allergist! You need allergy skin testing to determine exactly what you are allergic to, and there are several other treatments out there for you.

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My 3 year old daughter has real bad allergies. I gave her Claritin (loratadine) but it's not really working. I also used Vicks on her. Will that help her?

My 3 year old daughter has real bad allergies. I gave her Claritin (loratadine) but it's not really working. I also used Vicks on her. Will that help her?

Some: It may help with some congestion. A 24hr allergy med is best like Claritin, Zyrtec, or Allegra. These medications take 2-4 weeks to have full effect. If your daughter is still suffering a nasal steroid spray may be a great addition and some are FDA approved down to the age of 2. So if the OTC are not working talk to your doctor.

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Had sinus infection since July. Doc put me on Loratadine since antibios weren't working. Soon as I take med pain middle of head. Not there before. Bad?

Had sinus infection since July. Doc put me on Loratadine since antibios weren't working. Soon as I take med pain middle of head. Not there before. Bad?

Sinus: Probably a side effect of the drug. I'd stop it. That drug is used for allergies not sinus infection. If you have no fever might be allergies or chronic sinusitis. Although you can try a sinus rinse you should see an ENT to fully evaluate it

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Pain around my left eye when I touch my eye brow it hurts alil been taking Claritin (loratadine) & nasanex 3 days now not working headache also. Should I b worried?

Pain around my left eye when I touch my eye brow it hurts alil been taking Claritin (loratadine) & nasanex 3 days now not working headache also. Should I b worried?

See doctor: Need to consult your doctor to find out the cause. I presume there has been no history of trauma to your head recently.

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I'm having allergies at night with an itchy runny nose, sneezing and congestion. Loratadine isn't working, what else could I try?

I'm having allergies at night with an itchy runny nose, sneezing and congestion. Loratadine isn't working, what else could I try?

Allergies: The source of your allergies may be in your bedroom. You may be sensitive to the materials your sheets are made of, detergent you wash them in, your pillow, or even carpets and curtains. Use a hypoallergenic pillow, mild detergent, and wash or remove carpets and curtains. Avoid pets in the bedroom as you may be allergic to their dander. If no luck, get allergy testing to determine the source.

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Is it okay to take Claritin d with Tylenol cold for my nasal congestion? Nothing seems to be working. Stuff nose watery eyes sneezing headache?

Is it okay to take Claritin d with Tylenol cold for my nasal congestion? Nothing seems to be working. Stuff nose watery eyes sneezing headache?

Yes: There are no interactions between Tylenol &Claritin D. The Tylenol should relieve your headache. The Claritin-D should improve your congestion and cold / allergy symptoms. If you happen to have diabetes or hypertension, understand that the decongestant (“D”) in the Claritin raises blood pressure and blood sugar, and it’s important not to take the medication if your conditions aren’t under control

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