Loratadine Side Effects
Medically reviewed by Drugs.com. Last updated on Oct 3, 2023.
Applies to loratadine: oral capsule liquid filled, oral solution, oral syrup, oral tablet, oral tablet chewable, oral tablet disintegrating.
Serious side effects of Loratadine
Along with its needed effects, loratadine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking loratadine:
Incidence not known
- Drowsiness
For Healthcare Professionals
Applies to loratadine: oral capsule, oral syrup, oral tablet, oral tablet chewable, oral tablet disintegrating.
General
The most commonly reported side effects included headache, somnolence nervousness, and fatigue.[Ref]
Nervous system
Very common (10% or more): Headache (up to 12%)
Common (1% to 10%): Sedation/somnolence
Very rare (less than 0.01%): Dizziness, convulsion
Frequency not reported: Syncope, paresthesia[Ref]
Psychiatric
Common (1% to 10%): Nervousness
Uncommon (0.1% to 1%): Insomnia
Frequency not reported: Depression, paroniria[Ref]
Other
Common (1% to 10%): Fatigue
Frequency not reported: Fever, viral infection, tinnitus, malaise[Ref]
Gastrointestinal
Common (1% to 10%): Dry mouth
Very rare (less than 0.01%): Nausea, gastritis
Frequency not reported: Dyspepsia, diarrhea, constipation, abdominal/gastric pain, altered taste, increased saliva[Ref]
Metabolic
Uncommon (0.1% to 1%): Increased appetite[Ref]
Dermatologic
Very rare (less than 0.01%): Angioedema, rash, alopecia
Frequency not reported: Pruritus, rash on face[Ref]
Genitourinary
Frequency not reported: Increased frequency of urination, urine discoloration, menstruation delay[Ref]
Cardiovascular
Very rare (less than 0.01%): Tachycardia, palpitation
Frequency not reported: Hypertension, hypotension, chest pain[Ref]
Hypersensitivity
Very rare (less than 0.01%): Hypersensitivity reactions, anaphylaxis[Ref]
Hepatic
Very rare (less than 0.01%): Abnormal hepatic function[Ref]
Respiratory
Frequency not reported: Epistaxis, nasal dryness, pharyngitis, coughing[Ref]
Musculoskeletal
Frequency not reported: Myalgia[Ref]
Frequently asked questions
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Patient resources
- Loratadine drug information
- Loratadine Capsules and Tablets
- Loratadine Chewable Tablets
- Loratadine Liquid
- Loratadine Orally Disintegrating Tablets
Other brands
Claritin, Alavert, Children's Claritin Allergy, Claritin Reditabs, ... +3 more
Professional resources
Related treatment guides
References
1. Product Information. Claritin (loratadine). Schering Corporation. 2002.
2. Cerner Multum, Inc. UK Summary of Product Characteristics.
3. Cerner Multum, Inc. Australian Product Information.
Further information
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Some side effects may not be reported. You may report them to the FDA.
