The Nicotine Patch: Skin to Bloodstream to Receptor

A cigarette is a spike. A patch is a plateau. Smoke one cigarette and plasma nicotine leaps to 20–40 ng/mL within about five minutes, then falls away with a two-hour half-life. Stick on a 7 mg patch and the same molecule seeps through the skin at a steady trickle, so the blood level climbs for a few hours and then simply holds — at 5–10 ng/mL, below a single cigarette's peak, all day and all night. Press play to watch a week unfold: the patch on the skin, the receptors as Dr. Bryan Ardis describes them, and the seven-day trace. Then break it: smoke a cigarette, chew a piece of gum, or put on two patches at once.

Try this: let the 7 mg patch run into Day 2 and watch the trace flatten inside the green band. Press Smoke one cigarette and see the spike clear the entire ladder and fall back within hours. Then switch to 14 mg, press Two patches at once, and read the amber warning on the right.

Strength Schedule Diagram is illustrative — not to scale.
SKIN CUTAWAY patch → stratum corneum → dermis → capillary α7 RECEPTORS the receptor picture as Dr. Ardis describes it PLASMA NICOTINE — 7 DAYS patch bands shaded · smoker band hatched · cigarette peak bracketed Transdermal patch backing matrix adhesive stratum corneum — the barrier epidermis dermis capillary — into the blood fat rib cage or upper arm — his placement clean, dry skin · a fresh site each day a used patch still holds 30–60% of its nicotine bloodstream → → liver: CYP2A6 turns nicotine into cotinine (t½ ≈ 16 h) nicotine itself: half-life ≈ 2 h from the lungs a cell carrying α7 nicotinic acetylcholine receptors five lobes = the five subunits of α7 (a homopentamer) violet = spike / venom protein — his claim amber nicotine, drawn ~30× stickier — his figure 21 mg · 18–25 14 mg · 12–17 7 mg · 5–10 heavy smoker, all day · 15–30 one cigarette · peak 20–40 ng/mL strip = patch on (taller = two) · marks = your events faint line = the rest of the week if nothing else changes 0.0 ng/mL

Live readout

Clock
Day 1 · 07:00
24 h — a fresh patch each morning at 07:00
Plasma nicotine
0.0 ng/mL
no nicotine on board
Bands: 7 mg 5–10 · 14 mg 12–17 · 21 mg 18–25 · heavy smoker 15–30 all day · one cigarette peaks at 20–40
Patch
—
Load left in the patch: 100% (illustrative — a used patch keeps 30–60%)
Receptors (illustrative — Ardis framing)
α7 receptors holding nicotine: 0%
Spike / venom still bound — his claim: 100%
Resting heart rate (illustrative curve)
64 bpm
Resting 64 + up to ~10 — the protocol page expects a 5–10 bpm rise at steady state.
Cotinine (illustrative units)
0
The liver's breakdown product (CYP2A6), half-life ~16 h — it climbs slowly and lingers long after the nicotine itself has gone.
Today, hour by hour
Starting up…

What's happening

Day 1, 07:00 — the first patch goes on.
nicotine spike / venom protein (his framing) α7 receptor red cells time cursor

Which numbers are real? From the site's own protocol pages: the patch bands (7 mg → 5–10, 14 mg → 12–17, 21 mg → 18–25 ng/mL), a cigarette's 20–40 ng/mL peak within about 5 minutes and a heavy smoker's 15–30 ng/mL trough all day, nicotine's ~2-hour half-life and its clearance by liver CYP2A6 to cotinine (half-life ~16 h), the 30–60% of its load a used patch retains, and the expected 5–10 bpm rise in resting heart rate. Illustrative: everything else — the hour-by-hour shape of the curve is a teaching model scaled so that each strength plateaus in the middle of its band (not a pharmacokinetic simulation), and so are the gum peak, the receptor-occupancy and spike-bound percentages (the latter drawn as Dr. Ardis describes them), the heart-rate curve, the cotinine units, the load-remaining figure and the number of particles. Nothing here is a diagnosis or a dose recommendation.

The Science in Plain Language

Three shapes of the same molecule

A cigarette is a spike. Within about five minutes of the first puff, plasma nicotine peaks at 20–40 ng/mL, and then it falls away with a half-life of roughly two hours. A heavy smoker tops that spike up all day and sits on a trough of 15–30 ng/mL. A piece of gum is a smaller bump that arrives through the lining of the mouth. A patch is a plateau: nicotine seeps through the stratum corneum — the dead-cell barrier on top of the skin — into the capillaries of the dermis at a near-constant rate, so after a few hours the level in the blood stops climbing and simply holds. The protocol page's phrase is the right one: a patch changes the shape of the curve, not by itself its height.

The 7 / 14 / 21 mg ladder

The three 24-hour strengths produce three plasma bands: 7 mg gives roughly 5–10 ng/mL, 14 mg 12–17, and 21 mg 18–25. Line them up against the smoker's band and one fact stands out: the whole ladder ends at 25, under a cigarette's peak — but the 21 mg rung sits wholly inside a heavy smoker's day, and 14 mg crosses its floor. Only 7 mg clears that band outright. The animation's plateaus are scaled to land in the middle of each band; the ramp that leads to them is a teaching model, not a measurement.

Dr. Ardis's protocol, in his words

For long COVID, Dr. Bryan Ardis's instruction is “six days of a seven milligram nicotine patch” — on in the morning, worn for 24 hours, a fresh one each day. Of the case series he cites, he says that “on the third day, half of all their symptoms disappeared”; that is his description. For people new to nicotine he suggests cutting a 7 mg patch into strips and wearing about 1 mg a day for seven days before going up to about 3 mg; he says he himself wears 3.5 mg, half a 7 mg patch, every day. For prevention he describes a 14 mg patch cut into six pieces, about 2.3 mg daily. His gum instruction is the 2 mg piece, chewed for ten minutes, which he says gives “the whole dose in about five minutes”. Placement: the rib cage or the upper arm. If you feel dizzy or nauseated, halve the piece. Those are his instructions, reported as he gives them; the protocol page carries the course lengths and tapers.

The 16-hours-on / 8-off variant

The protocol page also describes wearing the patch for 16 hours and taking it off at bedtime. With a two-hour half-life the blood level halves by 1 a.m., halves again by 3 a.m. and is close to zero by morning, which is why the page lists fewer vivid dreams as the reason. Switch the schedule in the animation and the plateau becomes a daily sawtooth: off overnight, rebuilt over the morning once the fresh patch goes on at seven.

A two-hour half-life, and why two patches overshoot

A fresh patch each morning does not stack, because the old one comes off: the feed into the skin stays the same and the plateau barely flickers. Two patches worn together double the feed, and because the level settles where delivery in equals clearance out, the plateau doubles too. Two 14 mg patches head for roughly 29 ng/mL — above the top of the whole ladder and into a cigarette's range; two 21 mg patches for over 40. The protocol page's rule is blunt: never wear two patches at once. Two more of its figures belong here: a used patch still holds 30–60% of its nicotine, which is why it is a poisoning hazard for a child or a dog, and resting heart rate is expected to rise about 5–10 bpm at steady state.

The receptor picture, as he describes it

In Dr. Ardis's framing, spike and venom proteins bind the alpha-7 nicotinic acetylcholine receptor, and nicotine, which he says binds that receptor about 30 times more strongly, displaces and blocks them. The middle panel draws exactly that claim: violet shapes sit on the five-lobed receptors — alpha-7 really is built from five identical subunits — until amber nicotine arrives and knocks them off. The occupancy and “still bound” percentages are a saturating curve drawn to illustrate his description, not measured values. The site's receptor page explains the pharmacology of alpha-7 itself.

What is real here, and what is illustrative

Real, from the site's pages: the three patch bands, the cigarette and smoker figures, the two-hour nicotine half-life and the sixteen-hour cotinine half-life via the liver enzyme CYP2A6, the 30–60% retained load, and the 5–10 bpm heart-rate rise. Illustrative: the hour-by-hour shape of the curve, the gum peak, every receptor percentage, the heart-rate curve, the cotinine units, the load-remaining figure and the number of particles you see. This is a teaching model scaled to the bands above, not a pharmacokinetic simulation. It is also not medical advice: the protocol page's safety section lists who should not use nicotine at all.

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