Reviewed by Peptide Treatments Medical Advisory Board (Medical Advisory Board)
NAC (N-Acetylcysteine): Contraindications & Drug Interactions
Safety information for NAC (N-Acetylcysteine) including known contraindications, drug interactions, and important precautions.
Back to NAC (N-Acetylcysteine) overviewContraindications
- NAC allergy (rare)
- severe asthma (caution with inhaled formulation — may trigger bronchospasm)
Drug Interactions (3 interactions)
Important: This table summarizes known and theoretical interactions. Always consult a healthcare provider before combining NAC (N-Acetylcysteine) with any medication.
| Drug | Classification | Mechanism |
|---|---|---|
| activated charcoal | Documented | Activated charcoal adsorbs oral NAC, reducing absorption — separate administration by 2+ hours |
| nitroglycerin | Documented | NAC potentiates nitroglycerin-induced vasodilation and hypotension — monitor blood pressure |
| anticholinergics | Theoretical | May reduce NAC mucolytic effect by decreasing mucus secretion |
Use our interactive Drug Interaction Checker for real-time lookup.