No Doz
Generic name: caffeine [ KAF-een ]
Other brand names of caffeine include: Jet-Alert, No Doz, Pep-Back ReCharge, Stay Awake, Vivarin, Alert, Pep-Back Peak Performance
Drug class: CNS stimulants
What is No Doz?
No Doz is used to help you feel alert or wakeful when you are tired or drowsy.
No Doz should not be used as a substitute for sleep.
No Doz may also be used for purposes not listed in this medication guide.
No Doz 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.
Stop using No Doz and call your doctor if you have:
-
ongoing tiredness or drowsiness; or
-
ongoing sleep problems.
Common side effects of No Doz 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.
Related/similar drugs
Botox
Botox is used cosmetically to reduce facial lines and wrinkles and for medical purposes for ...
Warnings
Use exactly as directed on the label, or as prescribed by your doctor.
Before taking this medicine
No Doz is not approved for use by anyone younger than 12 years old. This medicine gum should not be used by anyone younger than 18 years old, or anyone who is sensitive to this medicine.
Ask a doctor or pharmacist if No Doz is safe to use if you have ever had:
-
heart problems;
-
a stomach ulcer; or
Tell your doctor if you are pregnant or breastfeeding.
How should I take No Doz?
Use exactly as directed on the label, or as prescribed by your doctor.
Each dose of this product usually contains about as much No Doz 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 No Doz tablet with or without food.
Do not chew more than 2 pieces of the No Doz gum at one time. Do not swallow the gum whole.
Store at room temperature away from moisture and heat.
What happens if I miss a dose?
Since No Doz 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 No Doz?
Avoid food or drinks that contain No Doz, such as coffee, tea, cola, or chocolate milk.
What other drugs will affect No Doz?
Ask a doctor or pharmacist before using No Doz with any other medications, especially tizanidine.
Other drugs may affect No Doz, 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.
Popular FAQ
How much caffeine is in Fioricet?
Fioricet contains 40 mg of caffeine, similar to a cup of tea. The following shows the average amount of caffeine in some common beverages:
- 8 oz of coffee: 80 to 100 mg of caffeine
- 8 oz green or black tea: 30 to 50 mg of caffeine
- 12 oz caffeinated soda: 30 to 40 mg of caffeine
Does caffeine affect Vraylar (cariprazine)?
Caffeine is not listed as having a drug interaction with the atypical antipsychotic medicine Vraylar (generic name: cariprazine). However, Vraylar may lead to restlessness, the feeling of the need to move around (akathisia), or trouble with sleeping (insomnia) in some patients. Call a health care provider right away if you or your family member has any of these symptoms while receiving Vraylar. Continue reading
How much caffeine is in Excedrin Migraine?
Each tablet of Excedrin Migraine contains 65 milligrams (mg) of caffeine, 250 mg of acetaminophen, and 250 mg of aspirin. The dose for adults is 2 caplets or geltabs with a glass of water. Do not take more than two tablets in any 24-hour period, unless directed by a doctor. Continue reading
Does Maxalt have caffeine in it?
No, Maxalt does not contain caffeine. Maxalt contains rizatriptan benzoate, a medicine in a class of prescription drugs known as “triptans” used for migraine headaches. Continue reading
Does caffeine help migraines?
Caffeine has been shown to increase the effects of pain relievers like aspirin and acetaminophen for migraine headaches, increasing the effectiveness of these medicines by up to 40%. Continue reading
More FAQ
- How long do caffeine withdrawal headaches last?
- Does caffeine cause high blood pressure?
- Does coffee help with asthma?
More about NoDoz (caffeine)
- Check interactions
- Compare alternatives
- Reviews (20)
- Side effects
- Dosage information
- During pregnancy
- Drug class: CNS stimulants
- Breastfeeding
- En español
Patient resources
Other brands
Lucidex, Vivarin, Cafcit, Pep-Back ReCharge, ... +4 more
Professional resources
Other brands
Related treatment guides
Further information
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.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Copyright 1996-2025 Cerner Multum, Inc. Version: 3.01.