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Doctor insights on: How Long Does It Take Claritin To Start Working

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Dr. Ashraf Abdel Azeem
539 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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How long does it take childrens Claritin (loratadine) to work?

How long does it take childrens Claritin (loratadine) to work?

1-2 weeks: If there are absolutely no improvements in about a week, I tend to switch people over to zyrtec. It can be a little sedating for some, but I have found it to be much more effective than claritin (loratadine). ...Read more

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How long does it take for loratadine to work?

Same day: You should be able to hopefully notice some results withing the same day you take it. ...Read more

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How long does it take for claritin-d to work.

How long does it take for claritin-d to work.

1 to 3 hours: Claritin d is a combination antihistamine [claritin= loratadine] and d= decongestant pseudoephedrine. This product is rapidly absorbed then metabolized to the active product with relief beginning within 1 to 3 hours. ...Read more

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HOW LONG DOES IT TAKE FOR CLARITIN (loratadine) LIQUID GELS TO KICK IN?

HOW LONG DOES IT TAKE FOR CLARITIN (loratadine) LIQUID GELS TO KICK IN?

In 1-3 hours: Claritin (loratadine) starts working within 1 to 3 hours. It reaches its peak effect in 8 to 12 hours. ...Read more

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How long does it take for Claritin (loratadine) to take effect on hives??

3 days to reach peak: Claritin (loratadine) (loratidine) takes 3 days to reach a steady state, so it could take that long for it to work on hives. Other non-drowsy antihistamines are a better choice: Allegra (fexofenadine) reaches peak effect within 2 hours and Zyrtec (cetirizine) reaches peak effect in 1-2 hours. If you see no benefit at all within 5 hours of taking these, they probably will not work for you. ...Read more

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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 ...Read more

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How long does Claritin (loratadine) take to work?

About 1.5 hours: The onset of clinical symptom relief is about 1.5 hours for claritin (loratadine). To read the study that compares this to zyrtec and Allegra go to: http://www. Ncbi. Nlm. Nih. Gov/pubmed/15176489. ...Read more

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How long does Claritin (loratadine) d take to work?

How long does Claritin (loratadine) d take to work?

Claritin (loratadine) D: Hello, this is a complicated answer in that claritin-d is a combination medication. The onset of Claritin is within 3 hours and the pseudofed will begin it's effects in the nasal cavity within 30 minutes. ...Read more

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How long it take for Claritin (loratadine) to work?

About 1.5 hours: Onset of clinical relief is about 1 hour for zyrtec and Allegra and about 1.5 hours for claritin (loratadine). To read the study, go to: http://www. Ncbi. Nlm. Nih. Gov/pubmed/15176489. ...Read more

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How long should it take for my Claritin (loratadine) to work?

How long should it take for my Claritin (loratadine) to work?

Up to 1 hour: Claritin (loratadine) can work relatively quickly in most people. That is, it usually works within 30 minutes. However, in some people it may take up to 60 minutes to have its full effect. If it is not working within that time, or if the duration of effect becomes less and less, seeing an allergy specialist for allergy testing would be recommended as other treatments may be more effective. ...Read more

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How long will it take for my Claritin (loratadine) to kick in?

About 1.5 hours: Onset of relief of symptoms will take about 1.5 hours for claritin (loratadine). This information can also be found at: http://www. Ncbi. Nlm. Nih. Gov/pubmed/15176489
other studies show that onset could take up to 3 hours. ...Read more

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How long after I take Claritin (loratadine) should the swelling go down?

Maybe 30 minutes: I am not sure this is the right medication to use for swelling, but usually Claritin (loratadine) starts kicking in within 30 minutes. ...Read more

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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. ...Read more

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Is it safe to take loratadine long term, everyday, for allergies?

Is it safe to take loratadine long term, everyday, for allergies?

Prob ok: Antihistamines have been around for decades, and certainly many more potent than loratadine. They say worldwide the most common drug taken is diphenhydramine, mostly for the sedative properties (as a sleep aid). Antihistamines can affect certain types of glaucoma, and accentuate urine retention in those with prostate issues and dry mucous membranes, but usually not so much with loratadine per say. ...Read more

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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. ...Read more

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How many weeks does it take for claritin (loratadine) 10mg to work? How long should I give it a try before deciding to switch to a different antihistamine?

How many weeks does it take for claritin (loratadine) 10mg to work? How long should I give it a try before deciding to switch to a different antihistamine?

Try for a few days: Antihistamines begin to work in less than an hour but a person may not feel significant relief for a few days. Claritin tends to be one of the weaker non-drowsy antihistamines. Others available without a prescription are Zyrtec, Allegra and Xyzal. If antihistamines are still not working then an evaluation by an allergist can be helpful to determine the cause of symptoms ...Read more

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How long after I take Claritin (loratadine) should my allergy swelling go down?

How long after I take Claritin (loratadine) should my allergy swelling go down?

Couple of hours: Antihistamines can help with the itching and swelling that accompany allergic reactions. If the swelling is significant, it may take several hours to a day or so. For milder symptoms, Loratadine may begin to help in 1-2 hours. ...Read more

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My dr prescribed Claritin (loratadine) for a skin reaction, but its no longer effective. Can I take a second dose so I can get a decent night's sleep?

Claritin (loratadine): Rather than doubling the dose of Claritin (loratadine) it may be wiser to try a different antihistamine until you can get back in and be seen. Not knowing what the condition is it is difficult to know exactly what to do. I suspect this may be chronic hives. There are certainly other things to do if it is. You may want to see an Allergist, ...Read more

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I am 14 weeks pregnant I took a Claritin D just once is that ok as long as I don't take it again or can it hurt baby?

I am 14 weeks pregnant I took a Claritin D just once is that ok as long as I don't take it again or can it hurt baby?

You're just fine: Claritin D won't hurt your baby even more than once, claritin (loratadine) is category B, while D (pseudoephedrine) is category C, with pregnancy, B is safer than C though, but both are safe, confer with your obstetrician on the next prenatal care visit, wish you a healthy pregnancy and a healthy baby ...Read more

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Is it safe to take claritin-d every day? Are there long term side effects and what does pseudoephedrine interact with, if anything?

Allergies: In general, it it safe to take antihistamines everyday for allergies. Claritin-d includes the decongestant as you mentioned, and I tend to avoid that for people on a long term basis. It increases vasoconstriction and this has a variety of effects including more work for the heart and elevated blood pressure. There are other medications that can help with congestion. See ent/allergist. ...Read more

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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 ...Read more

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Can allergies make you swell up and retain water? I notice when I take Claritin it lasts longer than Benadryl (diphenhydramine) and im not retaining fluids as much

Unexpected: If you mean swelling which lasts hours at a time, it is not from water retention and is called angioedema. Water retention tends to be most noticeable at the legs and ankles and would dent if you press your finger against the area. Claritin does not relieve water retention but may reduce angioedema and yes it has a longer duration of action than benadryl (diphenhydramine). ...Read more

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I have had dry mouth and little chest pains side effects from loratadine for a day and a half, how long will it take for the side effects to leave?

I have had dry mouth and little chest pains side effects from loratadine for a day and a half, how long will it take for the side effects to leave?

8 hour half life: The half life is 8 hours, so within several days there should be hardly any active metabolites of this medicine in your system. Best wishes. ...Read more

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Can I take 10mg of loratadine and use fluticasone nasal spray? I need immediate relief from these horrible allergies! Got a long day outside on tap!

Can I take 10mg of loratadine and use fluticasone nasal spray? I need immediate relief from these horrible allergies! Got a long day outside on tap!

Yes: Loratidine and fluticasone nasal spray are effective when used together. If this is not effective, adding an intranasal antihistamine (rx), such as azelastine (astelin) or olpatadine (patanase) is an option. Dymista is a combination of fluticasone and azelastine and works quickly. None of these products should adversely affect asthma or your current medications. ...Read more