Grace Parkin, a 34-year-old manager from Sheffield, lost eight stone after using the Mounjaro weight loss injection, which also eliminated her appetite for alcohol.
The mother of one discovered that the GLP-1 agonist medication drastically altered her relationship with alcohol, leaving her unable to enjoy beer or spirits while also curbing her impulsive spending habits.
Ms Parkin shed six stone over 18 months on the injections, bringing her weight down to 11 stone 10 lbs. She had previously struggled with her weight since her teenage years and reached around 19 stone before seeking medical intervention.
Sudden change at the pub
Ms Parkin noticed the unexpected side effect during the summer of 2024 while watching the UEFA European Football Championship with friends at a local pub.
Having routinely consumed several pints of lager during an evening out, she found herself unable to finish a single drink after ordering a beer out of instinct.
"I couldn't even get a third of the way down," Ms Parkin said. "I tried to drink it all but I remember thinking, 'oh god, this is not for me.' It didn't have the same effect it used to. It didn't taste nice at all and made me feel bloated."
Before beginning the treatments, she would regularly consume up to 10 vodka, lime, and lemonade drinks during Saturday night outings in Sheffield.
Impact on drinking habits
Since starting Mounjaro, Ms Parkin has shifted from drinking weekly to approximately once a month, rarely choosing spirits and opting only occasionally for a glass of wine.
"Sometimes I have to force myself," she said regarding finishing a glass of wine. "I'd probably say I'm drinking once a month as oppose to once a week. I'm not interested in it whatsoever."
Her weekend routines prior to taking the drug involved heavy alcohol consumption followed by late-night fast food and high-calorie recovery meals.
She described buying a pizza on the way home from Friday or Saturday night drinking sessions, followed by a bacon sandwich and takeaways the next day. "By Monday I'd hate myself and be back to the diet," she recalled.
Scientific research on GLP-1 drugs
Mounjaro, known generically as tirzepatide and manufactured by pharmaceutical company Eli Lilly, belongs to a class of medications known as GLP-1 receptor agonists.
These injectable drugs mimic natural gut hormones to regulate blood sugar levels, slow stomach emptying, and signal satiety to the brain to control appetite.
A growing body of clinical research indicates that GLP-1 agonists may also curb cravings for addictive substances by influencing the brain's reward pathways.
Studies show that using GLP-1 medications can reduce the risk of developing alcoholism by 18 per cent and cocaine addiction by 20 per cent.
Clinical trials conducted in the United States have also demonstrated that GLP-1 drugs effectively reduce alcohol cravings among moderate drinkers.
Medical experts believe the artificial hormones interact with dopamine receptors in the brain, mitigating the reward sensation typically triggered by alcohol and other substances.
Earlier weight loss struggles
Prior to turning to Mounjaro, Ms Parkin attempted several methods to manage her weight after struggling with eating patterns for nearly two decades.
In 2009, when her weight stood at approximately 19 stone, she underwent a procedure to insert a gastric balloon, a non-surgical device designed to reduce stomach capacity.
However, the gastric balloon resulted in a weight loss of only three stone and failed to address her underlying weekend binge eating habits.
Although she managed to lower her weight to just under 18 stone by May 2024 through diet efforts, she sought further options to accelerate her progress.
After reading a post about Mounjaro on Facebook in May 2024, she decided to begin the weight loss treatment.
Curbed spending habits
Ms Parkin reported that the drug rapidly eliminated her constant hunger pangs and unexpectedly curbed her compulsive impulse shopping.
Before taking Mounjaro, she frequently spent disposable income on clothes, shoes, and unbooked holidays, spending between £50 and £300 in a single evening.
"I'd be just buying shoes - trainers, Uggs, boots," she said. "Then it will be buying a load of jumpers or holiday clothes when I'd not even booked a holiday."
"I'd get an idea in my head, like I need some new sunglasses," she added. "And if I was bored on an evening I'd buy from any brands that did plus sized clothes."
She also made visits to her local shopping centre at least twice a week. "I was void filling, looking for that adrenaline," she explained. "If I could spend money and it could give that rush - I'd do it."
Since starting Mounjaro, Ms Parkin buys only necessary items and credits the medication with restoring control over her daily choices.
2>Future maintenance plans
She temporarily stopped using the weight loss injections in February to prepare for a cosmetic breast lift procedure before resuming treatment.
Now weighing 11 stone 10 lbs, she plans to stay on the medication indefinitely to maintain her current weight without further reduction.
"I'm 11 stone 10 now and I want to maintain my weight," she said. "I'm not planning on losing any more."
She emphasized that the absence of constant food noise has transformed her life. "It's been incredible," she added. "I'm never coming off the medication."
