Loratadine
Over-the-counterWhat is Loratadine?
Loratadine is an over-the-counter antihistamine that treats allergy symptoms. It blocks histamine, a chemical your body releases during allergic reactions. This medication provides 24-hour relief from sneezing, runny nose, and itchy eyes.
Loratadine belongs to the second-generation antihistamine family. This means it causes less drowsiness than older allergy medicines. The medication starts working within 1 to 3 hours after you take it. Effects last for a full day, so you only need one dose daily.
You can find loratadine under brand names like Claritin and Alavert. Generic versions work just as well and cost less. This medicine comes in tablets, liquid, and dissolving tablets. People ages 2 and older can safely use loratadine when following label directions.
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Common uses
- Seasonal allergies from pollen, grass, and trees
- Year-round allergies to dust mites, pet dander, and mold
- Hay fever with sneezing and nasal congestion
- Allergic rhinitis with runny nose and watery eyes
- Itchy, watery eyes from environmental allergens
- Hives and itching from skin allergies
How it works
When you encounter an allergen, your immune system releases histamine. Histamine attaches to receptors in your nose, eyes, and skin. This causes inflammation, swelling, and the annoying symptoms you recognize as allergies. Loratadine blocks these histamine receptors so the chemical cannot attach and trigger symptoms.
Unlike first-generation antihistamines, loratadine does not easily cross into your brain. This is why it rarely causes drowsiness or affects your thinking. The medicine focuses on blocking histamine in your nose, eyes, and skin where allergy symptoms happen. Your liver breaks down loratadine slowly, which is why one dose lasts 24 hours.
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Dosage information
Adults and children 6 years and older typically take 10 mg once daily. Children ages 2 to 5 usually take 5 mg once daily. You can take loratadine with or without food. Do not take more than the recommended dose. Taking extra doses does not provide better relief and may increase side effects. Always read the product label carefully and follow the directions exactly.
Side effects
- Headache
- Dry mouth
- Feeling tired or sleepy
- Stomach pain or nausea
- Nervousness or restlessness in children
Serious side effects are rare but require immediate medical attention. Stop taking loratadine and seek help if you experience fast or irregular heartbeat, severe dizziness, or difficulty breathing. Allergic reactions to loratadine itself can occur, causing rash, swelling, or severe itching. Contact your doctor if side effects persist or worsen.
Drug interactions
- Avoid alcohol, which may increase drowsiness
- Ketoconazole and erythromycin may increase loratadine levels
- Cimetidine may affect how your body processes loratadine
- Tell your doctor about all medications you take, including supplements
- Check with your doctor before using if you have liver or kidney disease
- Consult your doctor if you are pregnant or breastfeeding
Blood test monitoring
Loratadine does not typically require regular blood test monitoring for most people. However, if you have liver or kidney problems, your doctor may want to check your liver enzymes and kidney function periodically. These tests help ensure your body can process the medication safely. Rite Aid offers blood testing services that measure over 200 biomarkers, including liver and kidney function markers. Regular monitoring helps you catch potential issues early and adjust your allergy treatment plan if needed.
Related blood tests
Taking Loratadine? Monitor your levels.
- Track how your body responds
- Catch side effects early with blood work
- Share results with your doctor
Frequently asked questions
Yes, loratadine is available over the counter at Rite Aid and other pharmacies. You do not need a prescription to purchase it. Generic versions and brand names like Claritin are both available. Ask your Rite Aid pharmacist which option offers the best value for your needs.
Loratadine typically starts working within 1 to 3 hours after you take it. You may notice relief from sneezing and runny nose during this time. The medication reaches its peak effect at around 8 to 12 hours. One dose provides relief for 24 hours, so you only need to take it once daily.
Most people do not feel drowsy when taking loratadine. It is a second-generation antihistamine designed to cause minimal sleepiness. However, a small percentage of people may still experience some tiredness. If you feel drowsy, avoid driving or operating machinery until you know how the medicine affects you.
Yes, you can safely take loratadine daily throughout allergy season. Many people take it continuously for weeks or months when pollen counts are high. Daily use helps prevent allergy symptoms before they start. If you need to take loratadine for more than a few weeks, discuss your allergy management plan with your doctor.
Loratadine is safe for children ages 2 and older when used according to label directions. Children ages 2 to 5 take a lower dose than older children and adults. Always use the correct dose based on your child's age and weight. Talk to your pediatrician before giving loratadine to young children or if symptoms do not improve.
Do not combine loratadine with other antihistamines without asking your doctor first. Taking multiple antihistamines increases the risk of side effects. However, you can often safely use loratadine with nasal steroid sprays or eye drops for allergies. Your Rite Aid pharmacist can help you understand which combinations are safe.
Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and return to your regular schedule. Do not take two doses at once to make up for a missed dose. Taking extra loratadine does not provide better relief and may cause side effects.
Yes, loratadine effectively treats symptoms caused by pet dander allergies. It relieves sneezing, itchy eyes, and runny nose from exposure to cats, dogs, and other animals. For best results, take loratadine daily if you live with pets or know you will be around them. Combine the medication with other strategies like keeping pets out of bedrooms and using air filters.
Most healthy people do not need regular blood tests when taking loratadine. However, if you have liver or kidney disease, your doctor may monitor your liver enzymes and kidney function. Rite Aid offers blood testing services that check these important markers. Regular testing helps ensure your body processes medications safely and effectively.
Talk to your doctor before taking loratadine if you are pregnant or breastfeeding. Limited studies suggest loratadine is likely safe during pregnancy, but your doctor should weigh the benefits and risks. Small amounts of loratadine pass into breast milk. Your doctor can help you decide if loratadine is the right choice for your situation.