Is acetylcysteine over the counter?

Is acetylcysteine sold over the counter (OTC)?

Acetylcysteine (also spelled N-acetylcysteine) is sometimes available OTC, but it depends on the country and the exact product. In many places, acetylcysteine is sold OTC as an expectorant (often in cough/cold formulations) and may also be sold as a generic medicine under that name.

Why availability can differ (what to check on the label)

OTC versus prescription status often changes based on:
- The formulation (oral tablets/syrup/effervescent vs. other forms)
- Strength/dose
- Whether it’s marketed primarily for cough/secretions (common for OTC expectorants)
- Local pharmacy regulations

The safest way to confirm is to check your local pharmacy listing or the packaging for “OTC” or “prescription required.”

What form are you looking for (important)?

People commonly mean one of these:
- Oral acetylcysteine products used as a cough expectorant
- Acetylcysteine used in other clinical settings (for example, as an antidote for acetaminophen overdose, which is typically handled by healthcare settings and is not something bought OTC for home use)

If you tell me your country (and whether you mean tablets/syrup or inhaled/other forms), I can narrow down whether it’s available OTC where you are.