Active Ingredient

Loratadine

Loratadine is an antihistamine commonly used to relieve allergy symptoms. It is effective in managing conditions like hay fever and other allergic reactions.

It helps reduce symptoms such as sneezing, runny nose, and itchy eyes.

Written By Douglas C. Goldberg, MD

Reviewed By Philip Schein, MD

Last Updated 28 Nov 2025

Available Loratadine Brands

Claritin

Strengths 10mg

Alavert

Strengths 10mg

Loratadine Uses

Loratadine is typically used to alleviate symptoms associated with allergic reactions.

Hay fever (allergic rhinitis)
Chronic skin hives and itching
Allergic conjunctivitis
Nasal congestion due to allergies

How Loratadine Works

Loratadine works by blocking the action of histamine, a substance in the body that causes allergic symptoms.

As an antihistamine, it prevents histamine from binding to its receptors, thereby reducing symptoms like itching and swelling.

This action helps in providing relief from various allergic conditions.

Common side effects of Loratadine

Not everyone experiences side effects from Loratadine, and many side effects are mild and temporary.

Headache
Dry mouth
Fatigue
Drowsiness
Stomach pain
Nervousness

If side effects persist or become bothersome, consult a doctor.

Monitor your symptoms and report any unusual changes to your healthcare provider.
Avoid consuming alcohol while taking Loratadine, as it may increase drowsiness.
Inform your doctor about any other medications you are taking to avoid potential interactions.
Do not use Loratadine if you have severe liver problems without consulting a doctor.
Avoid driving or operating heavy machinery if you feel drowsy after taking Loratadine.

Always consult your doctor for personalized medical advice and before starting new treatments.

Frequently Asked Questions

What is Loratadine used for?

Loratadine is used to relieve symptoms of allergies, such as sneezing, runny nose, and itchy eyes.

How quickly does Loratadine work?

Loratadine typically starts to work within a few hours of taking it, providing relief from allergy symptoms.

How long do the effects of Loratadine last?

The effects of Loratadine usually last for 24 hours, providing all-day relief from allergy symptoms.

Is Loratadine safe to use with other medications?

Loratadine can interact with other medications, so it’s important to inform your doctor about all medicines you are taking.

Can Loratadine cause drowsiness?

Loratadine may cause drowsiness in some people, although it is generally considered to be a non-drowsy antihistamine.