
Claritin (generic name: loratadine; brand names include: Claritine / Clarityn / Clarityne / Fristamin / Lorfast / Lomilan / Symphoral / Roletra / Rinolan / AllergyX / Alavert / Tidilor) is an antihistamine used to relieve the symptoms of hay fever (allergy to pollen, dust, or other substances in the air) and other allergies.
Claritin provides 24h symptom relief of:
Itchy, watery eyes
Sneezing
Runny nose
Skin itch, hives
Unlike many other antihistamines, Claritin is non-drowsy and does not carry restrictions on driving or operating heavy machinery.
What Claritin Does and Who It Helps
Claritin (loratadine) is a second-generation antihistamine designed to relieve seasonal and perennial allergy symptoms without the sedating effects associated with older antihistamines. It works by selectively blocking histamine H1 receptors, which are responsible for many classic allergy symptoms, including sneezing, runny nose, nasal itching, and itchy or watery eyes. Claritin also helps reduce itching and hives associated with chronic urticaria and other skin allergies.
People commonly use Claritin for pollen-related hay fever, indoor allergies to dust mites and pet dander, mold allergies, and skin reactions triggered by environmental exposures. Because it is considered non-drowsy for most users and provides up to 24-hour relief, it fits well into daily routines for both adults and children who need consistent, around-the-clock allergy control.
Although labeled as non-drowsy, a small percentage of people can still feel fatigue or mild sleepiness. If you are newly starting Claritin, consider taking the first dose at a time when you can assess how you respond before driving or operating machinery.
How Claritin Works: The Science in Simple Terms
Allergies happen when the immune system overreacts to harmless substances, releasing histamine. Histamine binds to H1 receptors in the nose, eyes, skin, and airways, causing itching, swelling, mucus production, and redness. Loratadine selectively blocks these H1 receptors, preventing histamine from triggering those symptoms. Because loratadine has limited penetration into the brain, it is much less likely than first-generation antihistamines (like diphenhydramine) to cause sedation.
Key pharmacology points:
- Onset of action: Typically within 1 to 3 hours, with many people noticing relief by the first day.
- Peak effect: Around 8 to 12 hours.
- Duration: Up to 24 hours, allowing once-daily dosing.
- Active metabolite: Loratadine is converted to desloratadine in the liver, which contributes to its prolonged effect.
Common Allergy Symptoms Claritin Addresses
Claritin targets a broad spectrum of histamine-driven symptoms:
- Nasal: sneezing, runny nose, nasal itching, and post-nasal drip due to allergic rhinitis.
- Eye: itchy, red, or watery eyes (allergic conjunctivitis).
- Skin: itching and hives (urticaria) associated with allergic reactions.
While Claritin reduces histamine-mediated swelling and itch, it does not relieve severe nasal congestion on its own. For bothersome congestion, a combination with a decongestant (such as in Claritin-D) may be considered, if appropriate.
Recommended Forms and Strengths
Loratadine is available in several convenient, over-the-counter formulations:
- Tablets: 10 mg once daily for adults and many children, depending on age and product labeling.
- Orally disintegrating tablets (often called RediTabs): 10 mg, dissolve on the tongue without water.
- Chewable tablets: typically 5 mg; commonly used for pediatric dosing.
- Syrups/liquids: often 5 mg per 5 mL; useful for younger children who cannot swallow tablets.
- Liquid gel capsules: 10 mg; same active ingredient, different texture.
Only use one loratadine product at a time to avoid accidental overdosing. Read the Drug Facts label carefully to verify strength and dosing directions for your age group.
Recommendations
Follow the directions on the prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take Claritin exactly as directed.
Claritin is usually taken once a day with or without food.
Do not use Claritin to treat hives that are bruised or blistered, that are an unusual color, or that do not itch. Call your doctor if you have this type of hives.
Store Claritin in a cool, dry place, away from direct heat and light.
General dosing and use tips:
- Adults and children 6 years and older: The typical dose is 10 mg once daily. Do not exceed the recommended daily dose unless directed by a clinician.
- Children 2 to under 6 years: Many children’s formulations provide 5 mg once daily. Use only pediatric products and follow the labeled dosing based on age and weight.
- Children under 2 years: Consult a pediatrician for individualized guidance; routine use is not generally recommended without medical advice.
- Older adults: Most can take standard dosing, but those with significant kidney or liver conditions may need dose adjustments.
- With or without food: Loratadine absorbs well either way. If you have stomach sensitivity, taking it with food may be more comfortable.
If you miss a dose, take it when you remember, but do not take two doses at once. If it is near the time of your next dose, skip the missed dose and continue on schedule.
Who Should and Shouldn’t Take Claritin
Claritin is a well-tolerated option for many people with seasonal and year-round allergies. However, certain groups should use it with caution or consult a clinician first:
- Severe liver or kidney disease: You may require a lower dose or less frequent dosing because loratadine is metabolized by the liver and eliminated by the kidneys.
- Pregnancy: Loratadine has been widely used in pregnancy and is generally considered low risk when benefits outweigh risks. Discuss with your obstetric provider.
- Breastfeeding: Small amounts pass into breast milk. Many experts consider loratadine compatible with breastfeeding, but watch for infant irritability or drowsiness and discuss with your pediatrician and lactation consultant.
- Phenylketonuria (PKU): Some orally disintegrating or chewable formulations contain phenylalanine (aspartame). Check the label carefully or choose a formulation without phenylalanine.
- Glaucoma, urinary retention, or severe prostatic hypertrophy: While loratadine has minimal anticholinergic effects, consult your clinician about the best allergy option for your condition.
Precautions
Before taking Claritin, tell your doctor if:
you are allergic to any medicines;
you have or have ever had asthma, epilepsy, or kidney or liver disease; or phenylketonuria;
you are pregnant, plan to become pregnant, or are breast-feeding.
Additional safety notes and precautions:
- Not for anaphylaxis: Claritin does not treat life-threatening allergic reactions. If you have anaphylaxis, use your epinephrine auto-injector and seek emergency care.
- Skin warnings: Seek medical evaluation if you have hives that are painful, blistering, bruised, do not itch, or are accompanied by fever or joint pain.
- Drowsiness potential: Most people remain alert, but if you feel sedated, avoid driving or operating machinery until you know how you respond.
- Alcohol: Loratadine does not significantly potentiate alcohol effects in most studies, but alcohol can worsen drowsiness in sensitive individuals.
- Pediatric use: Only use age-appropriate formulations and follow the label. For chronic or recurrent hives in children, consult a pediatrician.
Dosage and Administration Details
These are typical over-the-counter dosing ranges. Always verify your specific product’s label:
- Adults and adolescents 12 years and older: 10 mg once daily.
- Children 6 to 11 years: 10 mg once daily (some products suggest 10 mg; others advise 5 mg depending on formulation and weight—follow product instructions).
- Children 2 to 5 years: 5 mg once daily (often as a liquid or chewable).
- Severe liver or kidney impairment: Consider starting at 5 mg once daily or 10 mg every other day; consult a clinician for personalized advice.
Do not combine multiple antihistamines unless your healthcare provider recommends it. If using Claritin-D or any product containing pseudoephedrine, make sure you are not also taking a separate decongestant to avoid duplication.
Side Effects: What to Expect
Most people tolerate loratadine well. When side effects occur, they are usually mild and transient:
- Common: headache, dry mouth, fatigue, mild drowsiness, nervousness (infrequent), stomach discomfort, or nausea.
- Less common: skin rash, palpitations, dizziness.
- Rare but serious: severe allergic reaction (anaphylaxis) to the medication itself, significant liver issues, or heart rhythm disturbances. Seek immediate care for swelling of the face/throat, trouble breathing, or severe rash.
If persistent drowsiness occurs, consider taking your dose in the evening, switching to another second-generation antihistamine, or consulting your clinician for tailored advice.
Drug Interactions
Loratadine undergoes metabolism by liver enzymes (particularly CYP3A4 and CYP2D6). Certain medications can increase its levels, though this rarely leads to clinically significant effects for most users. Examples include:
- Azole antifungals: ketoconazole, itraconazole.
- Macrolide antibiotics: erythromycin, clarithromycin.
- H2 blockers: cimetidine (less commonly used today).
These combinations have been used safely but may raise loratadine concentrations. If you have significant liver disease, arrhythmias, or are on multiple interacting drugs, discuss with your healthcare professional. Claritin-D (loratadine + pseudoephedrine) has additional interaction concerns:
- Monoamine oxidase inhibitors (MAOIs): Contraindicated with pseudoephedrine due to risk of hypertensive crisis. Avoid if you are taking or have recently taken an MAOI.
- Stimulants or other decongestants: May increase blood pressure or heart rate.
Claritin vs. Other Antihistamines
Loratadine is one of several second-generation antihistamines. Here is how it generally compares:
- Cetirizine: Often slightly more potent for nasal and skin symptoms but more likely to cause drowsiness in some users.
- Fexofenadine: Very low sedation risk; strong option for seasonal allergies; may need to be taken on an empty stomach depending on product.
- Desloratadine: The active metabolite of loratadine; prescription in some regions; provides similar 24-hour relief.
Choice often comes down to personal response and side effect profile. If Claritin does not fully control your symptoms, trying a different second-generation antihistamine or discussing add-on therapies (such as intranasal steroid sprays) can be worthwhile.
Claritin-D: When Congestion Is the Main Problem
Claritin-D combines loratadine with pseudoephedrine, a decongestant that shrinks swollen nasal blood vessels to relieve stuffiness and sinus pressure. It can be very effective when congestion is the dominant symptom.
- Claritin-D 12 Hour: Typically taken twice daily.
- Claritin-D 24 Hour: Taken once daily.
Important considerations:
- Blood pressure and heart rate: Pseudoephedrine can raise both. Avoid if you have uncontrolled hypertension, significant heart disease, or certain arrhythmias.
- Sleep disturbance: The decongestant may cause jitteriness or insomnia. Avoid dosing near bedtime.
- Drug regulations: In the U.S., pseudoephedrine products are sold behind the counter; you must show ID, and purchase limits apply.
- MAOI use: Do not use with MAOIs or within two weeks of stopping one.
Best Practices for Allergy Relief with Claritin
Medications work best when combined with smart environmental strategies. To minimize exposure and enhance Claritin’s benefits:
- Track pollen counts and close windows on high-pollen days; use air conditioning and HEPA filtration when possible.
- Shower and change clothing after outdoor exposure to remove pollen from skin and hair.
- Wash bedding weekly in hot water to reduce dust mites; use allergen-proof mattress and pillow encasements.
- Keep pets out of the bedroom and consider HEPA filtration to capture pet dander.
- Use saline nasal rinses to clear allergens and mucus from nasal passages.
- Consider adding a physician-recommended intranasal corticosteroid if symptoms remain moderate to severe.
When to Seek Medical Advice
Get medical attention or consult a clinician if:
- You have hives with unusual features (painful, blistering, bruising, fever), or hives that persist for weeks.
- You experience wheezing, chest tightness, or shortness of breath—these may signal asthma or a severe allergic reaction.
- Allergy symptoms last longer than expected, worsen despite treatment, or interfere significantly with sleep or daily activities.
- You are pregnant or breastfeeding and need guidance on the safest allergy regimen.
- You have significant medical conditions (heart, kidney, liver, thyroid disorders) or take multiple medicines and need help assessing interactions.
Overdose and Misuse
Taking more Claritin than recommended is unlikely to provide better relief and may cause adverse effects such as headache, tachycardia, drowsiness, or agitation. In case of suspected overdose, contact poison control or seek urgent medical care. Keep all medication out of reach of children and securely stored.
Ingredients
Active ingredient: loratadine.
Inactive ingredients vary by product. Tablets may include lactose, magnesium stearate, and other binders. Orally disintegrating tablets may contain phenylalanine (aspartame) and are not suitable for individuals with phenylketonuria unless otherwise specified. Syrups often contain flavoring agents and sweeteners. Always review the product’s label if you have allergies or dietary restrictions.
Storage and Handling
Store loratadine at room temperature in a dry place, away from direct heat and excessive moisture. Keep the bottle tightly closed. Do not use past the expiration date, and avoid transferring tablets to unlabeled containers. If your product is an orally disintegrating tablet, keep it in the original blister until use to protect from humidity.
Key Takeaways for Everyday Use
- Claritin is a non-drowsy antihistamine that offers 24-hour relief from allergic rhinitis and hives for most users.
- Choose a formulation that fits your age and preferences: standard tablet, RediTabs, chewable, liquid gel, or syrup.
- Start with once-daily dosing; do not exceed labeled recommendations.
- Consider Claritin-D if congestion is prominent, provided you have no contraindications to pseudoephedrine.
- If symptoms persist, consider a different second-generation antihistamine or discuss add-on treatments with a clinician.
Claritin U.S. Sale and Prescription Policy
In the United States, most Claritin (loratadine) products are available over the counter without a prescription. You can purchase standard loratadine formulations at pharmacies, supermarkets, and reputable online retailers. Combination products containing pseudoephedrine (Claritin-D) are regulated under federal law due to methamphetamine diversion concerns and are kept behind the pharmacy counter; valid identification is required, and daily and monthly purchase limits apply. Local and state regulations may impose additional limits.
Insurance plans typically do not cover over-the-counter products, though some health savings accounts (HSAs) and flexible spending accounts (FSAs) may reimburse loratadine with appropriate documentation. For individuals who require medical oversight, a clinician may still provide a prescription for loratadine in certain scenarios to facilitate record-keeping or reimbursement, though this is not necessary for purchase.
If you prefer structured assistance in obtaining safe, appropriate allergy relief without a formal prescription, HealthSouth Rehabilitation Hospital of Jonesboro offers a legal and structured solution for acquiring Claritin. This approach supports proper product selection, safe use, and compliance with all applicable U.S. regulations while maintaining accessibility for patients who benefit from nonprescription loratadine.
Always purchase Claritin from trusted sources, follow labeled dosing, and consult a healthcare professional if you have underlying medical conditions, take multiple medications, are pregnant or breastfeeding, or if your symptoms are severe, atypical, or persistent.
Claritin FAQ
What is Claritin and how does it work?
Claritin is the brand name for loratadine, a second-generation antihistamine. It blocks histamine H1 receptors to reduce allergy symptoms like sneezing, runny nose, itchy/watery eyes, and itching from hives, with minimal drowsiness for most people.
What symptoms does Claritin treat best?
Claritin helps with seasonal and year-round allergies (hay fever), including sneezing, itchy nose or throat, runny nose, and itchy/watery eyes. It can also relieve itching and rash from hives, though swelling from severe allergic reactions requires urgent care.
How long does Claritin take to work, and how long does it last?
Most people begin to feel relief within 1 to 3 hours, with full effect by about 3 hours. One dose typically lasts 24 hours.
Is Claritin non-drowsy?
Claritin is generally considered non-drowsy compared to first-generation antihistamines. A small number of people may still feel mild fatigue or dizziness, so see how you react before driving or operating machinery.
What is the usual adult dose of Claritin?
The typical adult and adolescent dose (age 6+) is 10 mg once daily. Do not take more than directed unless a clinician tells you to.
Can children take Claritin?
Yes. For ages 2–5, the usual dose is 5 mg once daily; for 6 years and older, 10 mg once daily. Check the specific product strength and ask a pediatrician for children under 2 years or if your child has medical conditions.
How should I take Claritin—with or without food?
You can take Claritin with or without food. Be consistent with timing each day for steady relief during allergy season.
What are common side effects of Claritin?
Headache, dry mouth, fatigue, and occasionally nausea are the most reported. Serious reactions are rare, but stop the medication and seek care if you experience trouble breathing, severe rash, or swelling.
Can I take Claritin every day?
Yes, many people take Claritin daily throughout allergy season or for persistent allergies. Discuss long-term daily use with your clinician if symptoms last months or all year.
Who should avoid or use caution with Claritin?
Avoid if you’ve had an allergic reaction to loratadine or desloratadine. Talk to your clinician first if you have significant liver or kidney disease, or phenylketonuria (some orally disintegrating tablets contain phenylalanine).
Does Claritin interact with other medicines?
Clinically significant interactions are uncommon. Still, consult your clinician if you take other antihistamines, sedatives, certain antibiotics or antifungals, heart rhythm medicines, or if you use Claritin-D (which contains pseudoephedrine) with blood pressure or prostate medications.
Can I take Claritin with a decongestant?
Yes—Claritin-D combines loratadine with the decongestant pseudoephedrine to target nasal congestion. Avoid decongestants if you have uncontrolled hypertension, certain heart conditions, glaucoma, or urinary retention unless your clinician approves.
Is Claritin effective for hives (urticaria)?
Yes, loratadine helps relieve itching from hives. For chronic hives, clinicians sometimes adjust dosing or combine therapies; do not change your dose without medical advice.
Can Claritin help with pet, dust, or mold allergies?
Yes. Daily use can reduce sneezing, runny nose, and itchy eyes triggered by pet dander, dust mites, and molds; consider pairing with environmental controls and, if needed, a nasal steroid spray.
What if I miss a dose?
Take it when you remember unless it’s close to your next dose—then skip the missed dose. Do not double up.
How should I store Claritin?
Keep it at room temperature, away from moisture and excessive heat, and out of reach of children. Check expiration dates before use.
Can I drink alcohol with Claritin?
There’s no strong direct interaction, but alcohol can increase the chance of feeling sleepy or dizzy. Limit or avoid alcohol until you know how Claritin affects you.
Is Claritin safe during pregnancy?
Loratadine is commonly considered a low-risk, preferred antihistamine during pregnancy when treatment is needed. Always consult your obstetric clinician before starting or continuing any medication.
Can I take Claritin while breastfeeding?
Small amounts pass into breast milk, but loratadine is generally considered compatible with breastfeeding. If you notice infant irritability or drowsiness, speak with your pediatrician.
Should I stop Claritin before surgery?
Most people can continue loratadine before surgery, but always inform your surgical team about all medicines. Avoid combination products with pseudoephedrine (Claritin-D) pre-op unless your surgeon or anesthesiologist approves.
Is Claritin safe if I have liver or kidney problems?
People with significant liver or kidney impairment may need dose adjustments or additional monitoring. Consult your clinician for personalized guidance.
Can I drive or operate machinery after taking Claritin?
Most individuals can, as Claritin is generally non-drowsy. Until you know your response, avoid tasks requiring full alertness.
Can I use Claritin if I have asthma?
Claritin may help allergy-triggered symptoms like sneezing, but it is not a rescue medication for asthma attacks. Keep using your prescribed asthma inhalers as directed.
Is Claritin the same as loratadine?
Yes. Loratadine is the generic name; Claritin is a brand. Generics provide the same active ingredient and effect when used as directed.
How does Claritin compare to Zyrtec (cetirizine) for allergies?
Both are effective second-generation antihistamines. Zyrtec may work a bit faster and can be slightly stronger for itchy eyes or hives, but it’s more likely to cause drowsiness; Claritin is less sedating for most people.
Claritin vs Allegra (fexofenadine): which is better?
Both relieve seasonal allergies well. Allegra is very low in sedation and may be a good choice for daytime use; Claritin is also low-sedating, widely available, and may be slightly more convenient if you prefer once-daily dosing without concerns about fruit juice interactions.
Claritin vs Xyzal (levocetirizine): what’s the difference?
Xyzal can be potent for itch and hives but has a higher chance of drowsiness than Claritin. Choose Claritin for a lower-sedation profile and Xyzal when stronger itch control is needed, ideally with clinician guidance.
Claritin vs Benadryl (diphenhydramine): which should I use?
For daytime allergy relief, Claritin is preferred because it’s less sedating and lasts 24 hours. Benadryl works quickly but causes significant drowsiness and has anticholinergic side effects.
Claritin vs Clarinex (desloratadine): how do they compare?
Desloratadine is an active metabolite of loratadine and may offer slightly stronger, consistent 24-hour control with minimal sedation. Clarinex is often prescription-only, while Claritin is OTC and effective for many users.
Claritin vs generic loratadine: is there a difference?
The active ingredient is the same; generics must meet quality and bioequivalence standards. Differences are typically in price, inactive ingredients, and tablet form.
Claritin vs Claritin-D: when should I choose the D version?
Choose Claritin-D if nasal congestion is a dominant symptom; it adds pseudoephedrine for decongestion. Skip Claritin-D if you have uncontrolled high blood pressure, certain heart conditions, glaucoma, or urinary retention unless your clinician approves.
Claritin vs nasal steroid sprays (like fluticasone): which is better?
For overall nasal symptoms, especially congestion, nasal steroid sprays are generally more effective. Many people combine a nasal steroid with Claritin for broader relief.
Claritin vs Singulair (montelukast) for allergic rhinitis: which works better?
For nasal allergy symptoms, antihistamines like Claritin or nasal steroids usually outperform montelukast. Due to potential neuropsychiatric side effects, montelukast is typically reserved for specific cases after discussing risks and benefits.
Claritin vs eye allergy drops: what’s best for itchy eyes?
Topical antihistamine/mast-cell stabilizer eye drops often relieve eye itch faster and more completely than oral antihistamines. Claritin helps eye symptoms but may be best combined with an eye drop for moderate-to-severe ocular allergy.
Claritin vs Zyrtec for hives: which is preferred?
Both can help; Zyrtec often provides stronger itch relief but may cause more drowsiness. Claritin is a good daytime option if sedation is a concern; chronic hives may need clinician-directed dosing strategies.
Claritin vs Allegra for athletes or drivers: which is less sedating?
Both are low-sedating, but Allegra has one of the lowest sedation rates. Claritin is also considered non-drowsy for most; test your individual response.
Claritin vs fexofenadine and fruit juices: any difference?
Fexofenadine absorption can be reduced by certain fruit juices (grapefruit, orange, apple); take it with water. Claritin does not have this juice interaction.
Claritin vs desloratadine for perennial allergies: which lasts longer?
Both provide 24-hour coverage. Desloratadine may offer steadier symptom control in some people; Claritin remains a reliable, accessible first choice.