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Generic Name: Acetylcysteine Effervescent Tablets (a se teel SIS teen)
Brand Name: Cetylev

Medically reviewed by Last updated on Nov 13, 2020.

Uses of Cetylev:

What do I need to tell my doctor BEFORE I take Cetylev?

  • If you have an allergy to acetylcysteine or any other part of Cetylev (acetylcysteine effervescent tablets).
  • If you are allergic to Cetylev (acetylcysteine effervescent tablets); any part of Cetylev (acetylcysteine effervescent tablets); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.

This medicine may interact with other drugs or health problems.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Cetylev (acetylcysteine effervescent tablets) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Cetylev?

  • Tell all of your health care providers that you take Cetylev (acetylcysteine effervescent tablets). This includes your doctors, nurses, pharmacists, and dentists.
  • If you are on a low-sodium or sodium-free diet, talk with your doctor. Some of these products have sodium.
  • Tell your doctor if you are pregnant, plan on getting pregnant, or are breast-feeding. You will need to talk about the benefits and risks to you and the baby.

How is this medicine (Cetylev) best taken?

Use Cetylev (acetylcysteine effervescent tablets) as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • Melt the tablet(s) in water as you have been told by the doctor. Do not swallow the tablet(s) whole.
  • Drink within 2 hours of mixing.
  • If you throw up within 1 hour of taking Cetylev (acetylcysteine effervescent tablets), take 1 more dose.
  • Those who have feeding tubes may use Cetylev (acetylcysteine effervescent tablets). Use as you have been told. Flush the feeding tube after Cetylev (acetylcysteine effervescent tablets) is given.

What do I do if I miss a dose?

  • Take a missed dose as soon as you think about it.
  • If it is close to the time for your next dose, skip the missed dose and go back to your normal time.
  • Do not take 2 doses at the same time or extra doses.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Shortness of breath.
  • Black, tarry, or bloody stools.
  • Throwing up blood or throw up that looks like coffee grounds.

What are some other side effects of Cetylev?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at

If OVERDOSE is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Cetylev?

  • Store in the original container at room temperature.
  • Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
  • Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

Consumer information use

  • If your symptoms or health problems do not get better or if they become worse, call your doctor.
  • Do not share your drugs with others and do not take anyone else's drugs.
  • Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Cetylev (acetylcysteine effervescent tablets), please talk with your doctor, nurse, pharmacist, or other health care provider.
  • If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.