Read the directions on the label before taking any medicine.
Learn how much to take and how often you should take it.
One or more could interact with other medicines you’re taking. Many OTC cold and allergy medicines contain them already. If you take more than 1 of these medicines, you may get much more antihistamine than is good for you.
These could include pain relievers or decongestants.
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OTC means you can buy them at a store, without a prescription from your doctor.
Keep them in a cool, dry place so they do not lose effectiveness.
Do not store them in bathrooms, which can get hot and humid.