Disclaimer: This article is for informational purposes only and does not constitute medical advice. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a physician or other qualified health provider with any questions you may have regarding a medical condition.
Overview
Claritin® contains loratadine, a non-drowsy antihistamine widely used in Canada.
Claritin® is a brand-name medication whose active ingredient is loratadine. Loratadine belongs to the second-generation antihistamine class, designed to minimize sedation compared to first-generation antihistamines. Other competing Canadian brands containing loratadine include Aerius® and Reactine®. These brands offer similar pharmacological effects and are approved by Health Canada. Claritin® is commonly marketed in tablet form and is well-known for its non-sedating properties.
How Claritin® Works
Claritin® blocks histamine receptors to reduce allergic response signals.
Loratadine, the active ingredient in Claritin®, works by selectively blocking peripheral H1 histamine receptors. Histamine is a chemical naturally released in the body which can cause symptoms when it binds to H1 receptors. By preventing histamine from attaching to these receptors, loratadine reduces the body’s allergic response signals. This action helps decrease symptoms related to histamine release without crossing the blood-brain barrier significantly, which is why it generally does not cause drowsiness.
Dosage Instructions of Claritin®
Available as tablets, chewable tablets, and syrup in Canada.
Claritin® is available in several formats to suit different preferences and needs. In Canada, these include 10 mg oral tablets, chewable tablets, and oral syrup. The syrup form is often preferred for children or individuals who have difficulty swallowing pills. All forms contain the same active ingredient, loratadine, and are dosed to provide consistent effects.
Follow label or doctor guidance; usually one tablet daily for adults.
Typical use involves taking one 10 mg tablet once daily, preferably at the same time each day. Chewable tablets or syrup should be dosed according to age and weight as indicated on the product monograph or by a healthcare professional. It is important not to exceed the recommended dose and to consult a doctor or pharmacist if unsure about usage. Treatment decisions should always be made with medical guidance.
Side Effects of Claritin®
Usually well tolerated; some may experience headache or dry mouth.
Common side effects reported with Claritin® include headache, dry mouth, and mild fatigue. Serious side effects are rare but could include allergic reactions such as rash, swelling, or difficulty breathing. If any unexpected or severe symptoms occur, seek medical advice promptly. Most users tolerate loratadine well due to its selective mechanism and low penetration into the brain.
Important Safety Information About Claritin®
Use caution with liver impairment and avoid alcohol use.
Health Canada advises caution in patients with liver impairment as loratadine is metabolized in the liver. Alcohol consumption should be minimized since it may enhance side effects such as dizziness or drowsiness, despite loratadine’s low sedative potential. Avoid use if hypersensitive to loratadine or related compounds. Always inform your healthcare provider about any other medications or health conditions before starting Claritin®.
Avoid combining with alcohol, ketoconazole, erythromycin, or other sedatives.
Claritin® may interact with certain medications, including ketoconazole, erythromycin, and cimetidine, which can increase loratadine blood levels. Alcohol and other central nervous system depressants may increase drowsiness risk despite loratadine’s non-sedating profile. Always disclose all current medications to your healthcare provider to avoid potential interactions.
Drug Interactions
Store at room temperature, away from moisture and heat.
Claritin® should be stored at controlled room temperature, typically between 15°C and 30°C (59°F and 86°F). Keep the medication in its original packaging to protect it from moisture and light. Avoid storing in bathrooms or places exposed to excessive heat or humidity. Keep out of reach of children.
Claritin® is available over-the-counter (OTC) in Canada.
Claritin® can be purchased without a prescription at pharmacies and retail stores across Canada. Despite its OTC status, it is important to consult a healthcare professional before starting any new medication to ensure it is appropriate for your individual health needs.
Brands & DIN Number of Claritin®
Brand Names
- Claritin®
- Aerius®
- Reactine®
DIN (Drug Identification Numbers)
00782696
Key Takeaways
- 1• Claritin® contains loratadine, a second-generation antihistamine.
- 2• Available in tablets, chewables, and syrup in Canada.
- 3• Blocks peripheral H1 histamine receptors to reduce allergic signals.
- 4• Generally non-drowsy with low risk of sedation.
- 5• Over-the-counter medication but consult a doctor before use.
- 6• Possible side effects include headache and dry mouth.
- 7• Avoid alcohol and certain medications to prevent interactions.
- 8• Store at room temperature, away from moisture.