6 doctors weighed in:

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

6 doctors weighed in
Dr. Jeffrey Rumbyrt
Internal Medicine - Allergy & Immunology
2 doctors agree

In brief: 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.

In brief: 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.
Dr. Jeffrey Rumbyrt
Dr. Jeffrey Rumbyrt
Thank
Dr. Gary Steven
Internal Medicine - Allergy & Immunology
1 doctor agrees

In brief: 1-2 hours

Most medications take one to two hours to be absorbed into the blood stream. Some, such as steroids, need to be taken for several days to build up to their full effect, but this is not the case with antihistamines.

In brief: 1-2 hours

Most medications take one to two hours to be absorbed into the blood stream. Some, such as steroids, need to be taken for several days to build up to their full effect, but this is not the case with antihistamines.
Dr. Gary Steven
Dr. Gary Steven
Thank
1 comment
Dr. Michael P Vaughn
typically, only persons with mild allergies can take an anti-histamine such as claritin with complete control of nasal symptoms, head to head studies favor nasal steroids for control of symptoms.
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