After Gastric Bypass: Drunk Faster?
Study Shows Patients Who Have Weight Loss Surgery May Need to Drink Carefully
WebMD News Archive
June 14, 2007 -- Patients who have undergone gastric bypass surgery to lose
weight already know they have to watch how much they eat after the operation to
keep that weight off. Now, a new study suggests they better keep a close eye on
their alcohol intake, too.
After the surgery, patients get tipsier faster and take longer to sober up,
says study researcher John M. Morton, MD, MPH, the director of bariatric
surgery at Stanford University School of Medicine.
"One drink could be enough to place them at risk for a DUI," Morton
The new study supports what gastric bypass surgeons have long suspected,
says Morton, who is presenting the findings this week at the 24th annual
meeting of the American Society for Bariatric Surgery in San Diego.
What Triggered the Study?
"We anecdotally know that patients have an altered sense of alcohol
[after the surgery]," Morton says. "It affects them quickly. My
patients often say, 'I get tipsy more easily' or 'I'm a cheap date
In late 2006, the Oprah Winfrey show aired a segment titled "Suddenly
Skinny," which discussed the reactions gastric bypass patients can have to
alcohol, including some who began to binge drink, in effect trading a food
addiction for an alcohol addiction. Morton says he got numerous calls from his
So Morton's team of researchers decided to see if science supports the
anecdotal observations that gastric bypass patients can't hold their liquor as
well as before.
The researchers compared the effects of drinking a 5-ounce glass of red wine
on 19 gastric bypass patients (whose weight had stabilized after the surgery)
and 17 people who had not had the surgery. The surgery patients' average age
was 47; the average age of the nonsurgery group was 37. The average weight of
the surgery group was 200 pounds; the average weight of the nonsurgery group
was 149. The bypass patients had gone, on average, from a body mass index or
BMI of 51 to 33 (still considered obese).
Everyone was instructed to drink the wine within 15 minutes, and then
Morton's team measured the participants' breath alcohol levels every five
minutes until the levels returned to zero. The researchers measured how long it
took each person after finishing the drink to reach peak breath alcohol levels,
which Morton says correlate with blood alcohol levels, and how long it took for
the breath alcohol levels to return to zero.
All participants also reported any symptoms they had, such as euphoria,
dizziness, or slurred speech.
The surgery patients had an average peak alcohol breath level of 0.08% --
enough to be declared drunk when driving a motor vehicle. The nonsurgery
participants had a level of 0.05%.
The bypass patients took 108 minutes, on average, to normalize back to a
zero breath level of alcohol; the breath levels of alcohol of the nonsurgery
group returned to zero after 72 minutes.
Based on the levels and the time it took for them to normalize, the surgery
patients should have had more or greater symptoms than the nonsurgery group.
But surprisingly, "the symptoms were exactly the same," says Morton.
The surgery patients' symptoms "should have been more pronounced because
their peaks were higher and they took longer to normalize."