NAD+ safety, side effects and monitoring
NAD+ is a coenzyme present in every living cell, central to mitochondrial energy production and to the activity of sirtuins and PARP enzymes involved in DNA repair. It is sold by longevity and wellness clinics as an intravenous infusion, a subcutaneous injection and an oral or sublingual supplement, marketed for energy, cognition, addiction recovery and anti-ageing.
Safety profile
Infusion-site reactions, flushing, nausea, chest tightness and headache are commonly reported, and are usually related to infusion rate. The bigger issue is unknown long-term safety: NAD+ affects fundamental cellular pathways including DNA repair, and there is a theoretical concern — not a demonstrated one — about effects on cell proliferation. Anyone with a cancer history should discuss this with an oncologist before starting.
Monitoring
A legitimate programme establishes a baseline before it ships anything. For NAD+, ask what will be measured before you start, at what interval it will be re-measured, and what result would indicate the treatment is not working — a provider who cannot answer the last question has no plan for stopping.
Questions to ask
- Is the NAD+ compounded, and by which state-licensed pharmacy?
- What is the concentration and total dose per infusion?
- What specific outcome are we targeting, and how will we measure it?
- What is the evidence for that outcome in humans, not mice?
- What is the total cost including infusion time and follow-up?
Questions to ask about the pharmacy
The pharmacy matters more than the telehealth brand on the front of the website. The telehealth company arranges the consultation; the pharmacy makes the medicine you inject.
- Which specific pharmacy will fill my prescription? Not "our network" — the name of the facility.
- Is it a 503A state-licensed pharmacy or a 503B FDA-registered outsourcing facility? These are different regulatory categories with different oversight, and a company can use both for different products.
- In which state is it licensed, and can I look up the licence? State boards of pharmacy publish licensee databases.
- What is the exact substance, salt form and concentration? Get it in writing, and check the substance’s status on our peptide status table.
- Is the vial single-dose or multi-dose? A multi-dose vial requires you to measure each dose yourself, which is the most common source of the dosing errors behind reported adverse events.
- Will you provide a certificate of analysis?
- Has the pharmacy received any FDA warning letter or state board action?
A provider that answers all seven in writing is demonstrating something real. A provider that will not name its pharmacy has given you an answer, whether it intended to or not.
Frequently asked questions
What does NAD+ cost through telehealth?
We have not verified a market price. On October 15, 2026, Oak Longevity listed NAD+ injections at $175 a month, regularly $199, a promotional price. That is one provider’s page, not a typical price. Ask any clinic for the total cost per month, including visits and supplies, in writing.
Is NAD+ FDA-approved?
No. There is no FDA-approved NAD+ drug as of October 15, 2026. NAD is in Category 1 of FDA’s interim 503A policy, so licensed pharmacies may compound it while FDA evaluates it. That is enforcement discretion, not approval or proof that it works.
Does NAD+ work?
Human studies of NAD+ injections and drips are small and short and mostly show that NAD+ levels rise. Claims about slower ageing, energy or sharper thinking rest largely on animal research. We have not re-read the literature for this update and cite no trial.
Sources
- U.S. Food and Drug Administration — approved labels and compounding guidance for this molecule.
- PubMed / NIH — indexed human clinical literature.
- ClinicalTrials.gov — registered trials, where they exist.
- Our source hierarchy and pricing-verification methodology.