loratadine, Claritin, Claritin RediTabs, Alavert, others (cont.)

Pharmacy Author:
Medical and Pharmacy Editor:
Medical and Pharmacy Editor:

DOSING: The usual dose of loratadine is 10 mg daily for adults and children older than six years of age. The dose for children 2 to 6 years of age is 5 mg daily.

DRUG INTERACTIONS: Erythromycin, cimetidine (Tagamet), and ketoconazole (Nizoral) increase the blood concentration of loratadine by inhibiting the elimination of loratadine. This may result in increased adverse events from loratadine.

St. John's wort, carbamazepine (Tegretol, Tegretol XR , Equetro, Carbatrol, Epitol, Teril), and rifampin reduce blood levels of loratadine.

PREGNANCY: There are no adequate studies of loratadine in pregnant women. Loratidine should be used during pregnancy only if it is clearly needed.

NURSING MOTHERS: Loratadine is secreted in breast milk at levels similar to blood levels. Nursing mothers should decide whether to stop breastfeeding or discontinue loratadine.

SIDE EFFECTS: The most common adverse events with loratadine are headache, drowsiness, fatigue and dry mouth. Nervousness and difficulty sleeping have also been reported.

Reference: FDA Prescribing Information


Medically Reviewed by a Doctor on 8/7/2014


Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Pill Finder Tool

Need help identifying pills and medications?
Use the pill identifier tool on RxList.


Back to Medications Index