Nac Coupons & Prices

Looking for a NAC (acetylcysteine) coupon? Prescription acetylcysteine is an inexpensive generic, but the cash price can still swing widely from one pharmacy to the next, so it pays to compare before you fill. Rx.com checks prices across more than 60,000 pharmacies and gives you a free discount coupon you can use at the counter. Enter your ZIP above to see today's price for acetylcysteine near you.

What is NAC (acetylcysteine) and how does it work?

Acetylcysteine, often abbreviated NAC (N-acetylcysteine), is a mucolytic agent, an antioxidant, and a precursor the body uses to make glutathione. It is FDA-approved for two main prescription purposes: as an antidote to prevent or lessen liver injury after a potentially harmful acetaminophen (acetaminophen, brand Tylenol) overdose, and as an inhaled mucolytic that thins and loosens thick mucus in lung conditions such as cystic fibrosis, chronic bronchitis, COPD, and pneumonia, or to help clear secretions before and after bronchoscopy.

As an antidote, it is given intravenously (the brand Acetadote uses a 21-hour regimen) or by mouth (a 72-hour regimen). As a mucolytic, it is given as an inhalation solution. Its rotten-egg sulfur odor comes from the sulfur (thiol) group in the molecule, which is also the part that makes it work.

Prescription acetylcysteine vs. NAC supplements

This can be confusing because the same molecule is sold two very different ways. Hospital and pharmacy forms of acetylcysteine (IV, oral, and inhalation solutions) are FDA-approved prescription medicines used for the situations above. NAC is also very widely sold over the counter as a dietary supplement, and people take it off-label for things like contrast-related kidney protection, chronic bronchitis, certain psychiatric conditions, and as a general antioxidant or glutathione booster.

Those supplement and off-label uses are not FDA-approved indications, and supplements are not regulated the same way prescription drugs are. If you were prescribed acetylcysteine, use the specific form and dose your provider ordered rather than substituting an OTC supplement. This page is about the prescription drug and is not medical advice.

Cost and savings: what to expect without insurance

Acetylcysteine is available as an FDA-approved generic, which usually keeps the price low compared with brand-name medicines. Even so, cash prices are not the same everywhere. Two pharmacies on the same street can quote very different numbers for the identical product, which is exactly why comparing matters. IV acetylcysteine is typically administered in a hospital or emergency setting, so an outpatient coupon most often applies to the oral or inhalation solution your pharmacy dispenses.

There is no manufacturer copay or savings card for generic acetylcysteine, but you do not need one to save. A free Rx.com discount coupon works whether or not you have insurance, and it can sometimes beat an insurance copay. Enter your ZIP above to see today's price at pharmacies near you, then bring the coupon to the counter.

Related medicines and alternatives

The right medicine depends on why acetylcysteine was prescribed, and only your provider can make that call. A few related medicines people compare it with:

• Acetaminophen (Tylenol) is the pain and fever reducer that acetylcysteine is used to treat in overdose situations.
• Guaifenesin is an oral expectorant that thins mucus so a cough can clear it, an easier-to-take option for everyday chest congestion.
• Albuterol is a bronchodilator that opens the airways; it is often given alongside inhaled acetylcysteine because the mucolytic can trigger airway tightening.

Do not switch or combine medicines on your own. Use the price tools above to compare whichever medicine you and your provider decide on.

Safety and side effects (talk to your provider)

Acetylcysteine has no boxed warning. The most important risk is with the IV form: anaphylactoid reactions such as flushing, rash, low blood pressure, and wheezing or bronchospasm can occur, usually within the first hour of the loading dose. These are managed by slowing or stopping the infusion and treating symptoms, and the risk is higher at higher blood levels. The IV form can also cause fluid overload or low sodium, especially in people under 40 kg or those who need to limit fluids.

Use caution if you have asthma or a history of bronchospasm, because inhaled acetylcysteine can tighten the airways (which is why it is often paired with a bronchodilator). The oral and inhaled forms have an unpleasant rotten-egg sulfur smell and can cause nausea and vomiting. Severe skin reactions, including Stevens-Johnson syndrome, have been reported rarely. This is not a complete list; ask your provider or pharmacist about your specific situation and report any serious reaction right away.