NAC is a precursor to glutathione — your body's master antioxidant. It has anti-inflammatory, antioxidant, and mucus-thinning properties. Our research, from 16 RCTs, 20 meta-analyses, and 39,369 participants, shows broad moderate evidence across respiratory conditions (COPD), psychiatric conditions (bipolar, OCD, addiction), and general antioxidant support. It's also the clinical antidote for acetaminophen overdose. Key safety concern: it impairs blood clotting and causes severe hypotension when combined with nitroglycerin.
Severe hypotension + headache
Avoid combination.
Increased bleeding risk
Use caution. Discontinue before surgery.
Additive hypotension
Monitor BP.
Conditionally Prohibited. IV infusion >100mL per 12-hour period without medical indication is prohibited.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated: April 5, 2026
Not medical advice. Based on published clinical research and systematic reviews.
Safety
Moderate interactions. Monitoring, timing separation, or dose adjustment may be required.
Nitroglycerin
NAC potentiates nitric oxide vasodilation.
Source: Clinical pharmacology
Activated charcoal
Charcoal adsorbs NAC, reducing efficacy.
Source: Emergency medicine standard
Anticoagulants
NAC has mild antiplatelet properties.
Source: Clinical consensus
Timing Separation Rules
Educational information only. This is not medical advice. These statements have not been evaluated by the FDA. Talk to your prescriber before starting, stopping, or combining any supplement with prescription medication.