caffeine

Generic Name: caffeine

What is caffeine?

Caffeine is used to help you feel alert or wakeful when you are tired or drowsy.

Caffeine should not be used as a substitute for sleep.

Caffeine may also be used for purposes not listed in this medication guide.

What are the possible side effects of caffeine?

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

Stop using caffeine and call your doctor if you have:

Common side effects may include:

  • feeling restless;
  • loss of appetite; or
  • sleep problems (insomnia).

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

What is the most important information I should know about caffeine?

Use exactly as directed on the label, or as prescribed by your doctor.

What should I discuss with my healthcare provider before taking caffeine?

Caffeine is not approved for use by anyone younger than 12 years old. Caffeine gum should not be used by anyone younger than 18 years old, or anyone who is sensitive to caffeine.

Ask a doctor or pharmacist if this medicine is safe to use if you have ever had:

Tell your doctor if you are pregnant or breastfeeding.

How should I take caffeine?

Use exactly as directed on the label, or as prescribed by your doctor.

Each dose of this product usually contains about as much caffeine as a cup of coffee, a can of cola, or one energy drink.

Do not use more of this product than is recommended on the label. The US Food and Drug Administration (FDA) recommends not consuming more than a total of 400 milligrams of caffeine per day in any form.

You may take the caffeine tablet with or without food.

Do not chew more than 2 pieces of the caffeine gum at one time. Do not swallow the gum whole.

Store at room temperature away from moisture and heat.

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What happens if I miss a dose?

Since caffeine is used when needed, you may not be on a dosing schedule. Skip any missed dose if it's almost time for your next dose. Do not use two doses at one time.

What happens if I overdose?

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

Overdose symptoms may include fast heartbeats, trouble sleeping, or feeling nervous or irritable.

What should I avoid while taking caffeine?

Avoid food or drinks that contain caffeine, such as coffee, tea, cola, or chocolate milk.

What other drugs will affect caffeine?

Ask a doctor or pharmacist before using caffeine with any other medications, especially tizanidine.

Other drugs may affect caffeine, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

Where can I get more information?

Your pharmacist can provide more information about caffeine.


Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
Every effort has been made to ensure that the information provided by Cerner Multum, Inc. ('Multum') is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist licensed healthcare practitioners in caring for their patients and/or to serve consumers viewing this service as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

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Reviewed on 7/12/2021

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