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how long does it take claritin to start working

A 40-year-old member asked:
Dr. Andrew Murphy
29 years experience Allergy and Immunology
Pretty Quickly: Most antihistamines will start to work within the first 30-40 minutes.
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A 44-year-old member asked:
Dr. Scott Diede
A Verified Doctor answered
A US doctor answered Learn more
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 foun ... Read More
A 23-year-old female asked:
Dr. John Munshower
30 years experience Family Medicine
Same day: You should be able to hopefully notice some results withing the same day you take it.
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A 18-year-old male asked:
Dr. Michael Zacharisen
33 years experience Allergy and Immunology
1 to 3 hours: Claritin d is a combination antihistamine [claritin= loratadine] and d= decongestant pseudoephedrine. This product is rapidly absorbed then metaboliz ... Read More
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A 59-year-old female asked:
Dr. Robert Killian
28 years experience General Practice
Misinformed: Claritin (loratadine) or any other anti-histamine would treat the itch of a rash, but not treat the rash. Are you expecting claritin (loratadine) to ... Read More
A male asked:
Dr. Al Hegab
Dr. Al Hegab answered
40 years experience Allergy and Immunology
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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A 42-year-old member asked:
Dr. Michael Zacharisen
33 years experience Allergy and Immunology
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: ... Read More
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A 34-year-old member asked:
Dr. Michael Zacharisen
33 years experience Allergy and Immunology
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.N ... Read More
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A 43-year-old member asked:
Dr. Franklyn Gergits
29 years experience ENT and Head and Neck Surgery
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 beg ... Read More

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