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The effect of nicotine on gastric emptyingremains controversial. Gastric emptying is delayed inchronic smokers after smoking high-dose nicotinecigarettes, but it is unchanged after chewing nicotinegums. No information is available on the effect oftransdermal nicotine patches on the gastric emptying ofsolid and liquid contents in healthy nonsmokers. Ourobjective was to prospectively evaluate the effect of the nicotine patch on gastric emptying ofliquid and solid contents in healthy nonsmokers. Tenhealthy nonsmoking volunteers under-went a baselinedual-isotope gastric scintigraphy with[111In]-diethylenetriaminepantaacetic acid (DTPA) and [99mTc]sulfurcolloid isotopes to evaluate prospectively the gastricemptying of liquid and solid contents, respectively. Thegastric scintigraphy was repeated after placing a transdermal nicotine patch (Habitrol) for 12 hrdesigned to deliver 14 mg of nicotine per day. Plasmanicotine level was measured prior to baseline gastricscintigraphy and after 12 hr placing the nicotine patch. Plasma nicotine was absent in allsubjects at baseline and but was significantly elevatedafter 12 hr of nicotine patch (P < 0.009). The meanhalf-emptying times (T1/2) for the gastricemptying of liquids before and after nicotine patchplacement were 31.2 ± 23.3 and 25.6 ± 8.4min, respectively (P = 0.498). The mean T1/2sfor the gastric emptying of solids before and afternicotine patch placement were 70.1 ± 34.0 and 59.7± 31.4 min, respectively (P = 0.202). There wasno correlation between the plasma nicotine level andgastric emptying of liquid and solid contents(correlation coefficient = –0.23 and –0.01, respectively).In conclusion, acute transdermal delivery of nicotinedoes not affect the gastric emptying of solid and liquidcontents in healthy nonsmoking subjects. |
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