Nicotine Replacement Therapy in Detail
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Direct answer
The patch supplies a steady state and the gum supplies a rescue dose — which is why combination nicotine replacement therapy beats any single form. NRT roughly doubles quit rates against placebo by buffering withdrawal, and it works best prescribed like a drug, not sold like a lozenge: gum 2 mg if smoking 20 or fewer cigarettes a day, 4 mg if more, chewed until peppery then "parked" against the cheek, with no coffee, cola or juice within 15 minutes because acidic saliva traps nicotine in the stomach. The patch steps down 21 → 14 → 7 mg over 8–12 weeks. Varenicline, a partial α4β2 agonist, outperforms NRT monotherapy; bupropion stands alongside. Contraindications are fewer than assumed — NRT remains safer than continued smoking even after a recent myocardial infarction.
What you must remember
- Gum technique: chew slowly until a peppery or tingling taste, then park between cheek and gum; nicotine absorbs buccally — continuous chewing sends it to the stomach, causing nausea without benefit.
- The 2/4 mg rule: dependence and heavy smoking (>20–25 cigarettes/day or first cigarette within 30 minutes of waking) push the 4 mg gum or lozenge.
- Acid rule: coffee, tea, cola, juice and anything acidic lower buccal pH and block absorption — no drinks 15 minutes before or during use.
- Patch ladder: 21 mg daily for 4–6 weeks → 14 mg → 7 mg (halve early if smoking under 10/day); the 24-hour patch causes vivid dreams and insomnia — remove at night if sleep suffers.
- Combination superiority: patch plus a short-acting form (gum, lozenge, spray) outperforms monotherapy (Cochrane evidence) — the standard viva answer.
- Varenicline: 0.5 mg then 1 mg twice daily from quit date; partial agonist at α4β2 (dampens craving, blunts reward); nausea and vivid dreams; the EAGLES trial removed the old neuropsychiatric scare.
- Bupropion SR 150 mg twice daily: start 1–2 weeks before quit date; contraindicated in epilepsy and eating disorders; lowers seizure threshold.
- Cautions, calibrated: recent MI (<2 weeks) and serious arrhythmia are relative cautions; in pregnancy, behavioural therapy first, intermittent NRT if needed; Fagerström score guides intensity.
Building a quit plan around the products
A 45-year-old smoking 30 cigarettes daily for two decades, Fagerström high (lights up within minutes of waking), wants to stop. Day one: 21 mg patch each morning plus 4 mg gum for breakthrough cravings — up to a piece every hour or two, not one after another like sweets. Counselling covers the two technique errors that sink most attempts: chewing gum continuously (nausea, no absorption) and sipping tea alongside it (blocked buccal uptake). Weeks four to six: if the patch is comfortable, the step-down begins; if cravings cluster in specific settings — commute, after meals — the gum, not willpower, meets them. A lapse is not failure; it is a cue to check technique and consider varenicline, which after titration blocks most smoking reward without replacing it with agonist spikes. Eight to twelve weeks of pharmacotherapy plus behavioural support gives the realistic ceiling — roughly doubling spontaneous quit rates. Writing the plan with dates, doses and technique beats listing products, because technique is the drug.
Where students slip
The first slip is pharmacokinetic: nicotine gum swallowed like chewing gum delivers nothing buccally and nausea gastrically — the chew-and-park instruction is the whole drug. The second is the acid rule, ignored because it sounds like folklore; low buccal pH ionises nicotine and blocks absorption, so the morning coffee-and-gum ritual fails silently. Third, students overstate NRT contraindications: smoking itself is a worse vasoconstrictor than NRT, so post-MI and stable cardiovascular disease do not bar it. Fourth, the varenicline neuropsychiatric warning is outdated — EAGLES found no excess, and repeating the scare as current fact dates the answer. Fifth, mixing up bupropion's timing (pre-quit loading for its noradrenergic/dopaminergic actions) with varenicline's (start on quit date). Finally, combination NRT being superior is the highest-yield sentence in the topic, and answers that list products without saying it miss the point the examiner is fishing for.
Frequently asked questions
Why does coffee reduce the effect of nicotine gum?
Acidic drinks lower buccal pH, ionising nicotine and preventing absorption through the oral mucosa.
How is the nicotine patch tapered?
Typically 21 mg for 4–6 weeks, then 14 mg, then 7 mg over a total of 8–12 weeks.
Why combine a patch with gum or lozenge?
The patch maintains steady-state nicotine while the short-acting form treats breakthrough cravings — the combination outperforms any single product.
Is varenicline still linked to psychiatric events?
The EAGLES trial found no significant neuropsychiatric excess; nausea and vivid dreams are the practical limitations.
When is 4 mg gum chosen over 2 mg?
Heavy dependence — more than 20–25 cigarettes daily or smoking within 30 minutes of waking.