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Leader Allergy Relief D-24

Generic name: loratadine and pseudoephedrine

Brand names: Alavert D-12, Claritin-D 12 Hour, Claritin-D 24 Hour, Leader Allergy Relief D-24, Loratadine-D 12 Hour, Loratadine-D 24 Hour

Used for common cold
Last updated November 2, 2026 0 views
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What is Leader Allergy Relief D-24?

Leader Allergy Relief D-24 is a combination medicine that treats sneezing, a runny or stuffy nose, sinus pain, itchy or watery eyes, and other allergy symptoms as well as symptoms of the common cold.

Leader Allergy Relief D-24 may also be used for other purposes not mentioned in this medication guide.

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How should I take Leader Allergy Relief D-24?

Use exactly as directed on the label, or as prescribed by your doctor. Cold or allergy medicine is only for short-term use until your symptoms clear up.

Always follow directions on the medicine label about giving this medicine to a child. Do not use the medicine only to make a child sleepy. Death can occur from the misuse of cold or allergy medicines in very young children.

Swallow the tablet whole and do not crush, chew, or break it.

Call your doctor if your symptoms do not improve after 7 days of treatment, or if you have a fever.

If you need surgery or medical tests, tell the surgeon or doctor ahead of time if you have taken a cold or allergy medicine within the past few days.

Store at room temperature away from moisture and heat.

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Warnings

Do not use this medicine if you have taken an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.

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Before taking this medicine

Do not use Leader Allergy Relief D-24 if you have taken an MAO inhibitor in the last 14 days. This could lead to a dangerous drug interaction. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.

Ask a doctor or pharmacist if it is safe to use Leader Allergy Relief D-24 if you have:

  • liver or kidney disease;
  • heart disease or high blood pressure;
  • diabetes;
  • a thyroid disorder; or
  • an enlarged prostate and problems with urination.

Do not use this medicine without a doctor's advice if you are pregnant.

You should not breast-feed while using this medicine.

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Leader Allergy Relief D-24 side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Leader Allergy Relief D-24 may cause serious side effects. Stop using Leader Allergy Relief D-24 and call your doctor right away if you have:

  • pounding heartbeats or fluttering in your chest; or
  • severe dizziness, nervousness, or restless feeling.

Common side effects of Leader Allergy Relief D-24 may include:

  • dry mouth, nose, or throat;
  • mild dizziness; or
  • sleep problems (insomnia).

This is not a complete list of side effects and others may happen. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

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What happens if I miss a dose?

Since Leader Allergy Relief D-24 is taken as needed, you might not have a regular dosing schedule. If you miss a dose and it's almost time for your next dose, just skip the missed dose. Do not take two doses at the same time.

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What happens if I overdose?

Seek emergency medical help or call the Poison Help line at 1-800-222-1222.

An overdose can lead to severe drowsiness.

Leader Allergy Relief D-24 may cause blurred vision and can affect your reactions. Avoid driving or doing anything dangerous until you are sure how this medicine will affect you.

Drinking alcohol can make some side effects of this medication worse.

Talk to a doctor or pharmacist before using other cough or cold medicines that might have similar ingredients.

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What other drugs will affect Leader Allergy Relief D-24?

Using Leader Allergy Relief D-24 with other medications that cause drowsiness can make you feel more tired. Talk to your doctor before using opioid medications, sleeping pills, muscle relaxers, or medicines for anxiety or seizures.

Other drugs may change how Leader Allergy Relief D-24 works, including prescription and over-the-counter medicines, vitamins, and herbal products. Inform your doctor about all the medicines you are currently taking and any medicine you begin or stop using.

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Related medicines

Before you take this medicine: the information on this page is general and may not cover your personal circumstances. Read the label supplied with your medicine and ask a pharmacist or doctor if you are unsure, especially if you are pregnant, breastfeeding, taking other medicines or managing a long-term condition.
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Content is provided for education and is not medical advice. See our medical disclaimer.