Slideshows Images Quizzes

Copyright © 2018 by RxList Inc. RxList does not provide medical advice, diagnosis or treatment. See additional information.

Acetylcysteine Solution

Last reviewed on RxList: 8/12/2020
Acetylcysteine Solution Patient Information Including Side Effects

Brand Names: N-A-C Sustain, NAC

Generic Name: acetylcysteine (oral)

What is acetylcysteine (N-A-C Sustain, NAC)?

Acetylcysteine is used to help prevent or lessen liver damage caused by taking large quantities of acetaminophen (Tylenol).

There are other brands and forms of acetylcysteine available, and some can be purchased over the counter. Not all forms of this medicine are effective as an acetaminophen antidote. Do not attempt to treat an acetaminophen overdose without medical advice.

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

What are the possible side effects of acetylcysteine (N-A-C Sustain, NAC)?

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

Call your doctor at once if you have:

Common side effects may include:

  • nausea, vomiting, upset stomach;
  • rash; or
  • fever.

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 acetylcysteine (N-A-C Sustain, NAC)?

In an emergency, you may not be able to tell caregivers about your health conditions. Make sure any doctor caring for you afterward knows you received this medicine.


COPD (chronic obstructive pulmonary disease) is the same as adult-onset asthma. See Answer
Acetylcysteine Solution Patient Information including How Should I Take

3 pharmacies near 20147 have coupons for N-A-C Sustain (Brand Names:Acetylcysteine Solution for 30ML of 20%)

Wegmans Food Markets Inc
Wegmans Food Markets Inc

Est. Regular Price


with free coupon

View Coupon

What should I discuss with my healthcare provider before taking acetylcysteine (N-A-C Sustain, NAC)?

You should not use acetylcysteine if you are allergic to it.

If possible before you receive acetylcysteine, tell your caregivers if you have ever had:

Ask a doctor before using this medicine if you are pregnant or breastfeeding.

In an emergency, you may not be able to tell caregivers if you are pregnant or breast feeding. Make sure any doctor caring for your pregnancy or your baby knows you received this medicine.

How should I take acetylcysteine (N-A-C Sustain, NAC)?

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

Do not take acetylcysteine at home if you don't understand all instructions.

If you are in an emergency medical setting: Before you take acetylcysteine, your caregivers will perform a blood test to measure the level of acetaminophen in your body. This test is most effective when performed within 4 to 8 hours after an acetaminophen overdose. If you cannot remember when you last took acetaminophen or how much you took, you will most likely be given the first dose of acetylcysteine right away.

Your doctor will determine how long to treat you with acetylcysteine. Do not stop taking this medicine until your doctor tells you to.

If you vomit within 1 hour after taking acetylcysteine, you may need to take another dose.

Store at room temperature away from moisture and heat.


COPD Foods to Boost Your Health - COPD Diet Tips See Slideshow
Acetylcysteine Solution Patient Information including If I Miss a Dose

What happens if I miss a dose (N-A-C Sustain, NAC)?

Take the medicine as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose (N-A-C Sustain, NAC)?

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

What should I avoid while taking acetylcysteine (N-A-C Sustain, NAC)?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What other drugs will affect acetylcysteine (N-A-C Sustain, NAC)?

Other drugs may affect acetylcysteine, 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 (N-A-C Sustain, NAC)?

Your doctor or pharmacist can provide more information about acetylcysteine.

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.

Health Solutions From Our Sponsors