Ai Analyzes Reddit Posts To Find Underreported Glp-1 Side Effects

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By utilizing AI to analyse much than 400,000 Reddit posts, Penn researchers person identified patient-reported symptoms associated pinch GLP-1s, nan celebrated weight-loss and glucosuria narcotics semaglutide and tirzepatide, that whitethorn not beryllium afloat captured successful objective tests aliases regulatory documents. 

The caller study, published successful Nature Health, covers much than half a decade of posts from astir 70,000 Reddit users and highlights 2 main classes of symptoms that warrant further study: reproductive symptoms, including irregular menstrual cycles, and temperature-related complaints, specified arsenic chills and basking flashes. 

Some of nan broadside effects we found, for illustration nausea, are good known, and that shows that nan method is picking up a existent signal. The underreported symptoms are leads that came from patients themselves, unprompted, and clinicians could perchance salary attraction to them." 

Sharath Chandra Guntuku, Research Associate Professor successful Computer and Information Science (CIS) astatine Penn Engineering and study's elder author

"Clinical tests mostly place nan astir vulnerable broadside effects of drugs," adds Lyle Ungar, Professor successful CIS and a co-author connected nan study. "But they tin neglect to find what symptoms patients are astir concerned about; moreover though societal media is not needfully representative, a ample postulation of posts whitethorn bespeak further concerns." 

The researchers be aware that their findings are not causal. "We can't opportunity that GLP-1s are really causing these symptoms," notes Neil Sehgal, nan study's first writer and a doctoral student successful CIS advised by Guntuku and Ungar. "But astir 4% of nan Reddit users successful our sample reported menstrual irregularities, which would beryllium moreover higher successful a female-only sample. We deliberation that's a awesome worthy investigating." 

Studying societal media for health

In 2011, Ungar participated successful 1 of nan earliest efforts to excavation online, user-created contented for accusation astir drugs' adverse effects. 

"Online diligent communities activity a batch for illustration a vicinity grapevine," says Ungar. "People who are surviving pinch these medications are swapping notes pinch each different successful existent time, sharing experiences that seldom make it into a doctor's agency sojourn aliases an charismatic report."

In nan years since, societal media usage has only grown, making information from these platforms progressively promising arsenic a root of accusation astir nan broadside effects of medications, moreover arsenic nan platforms themselves person made accessing nan information much difficult. (Guntuku has besides published investigation connected strategies for adapting to changes successful level access.)

"Clinical tests are nan golden standard, but by design, they are slow," says Guntuku. "This is not a replacement for trials, but it tin move overmuch faster, and that velocity matters erstwhile a supplier goes from niche to mainstream almost overnight." 

Leveraging AI to analyse societal media

Until now, nan astir challenging portion of this process, which Guntuku calls "computational societal listening," has been scale. 

Because users alteration successful really they picture their symptoms, nan effort required to representation individual societal media posts to connection successful nan Medical Dictionary for Regulatory Activities (MedDRA), which clinicians usage to picture symptoms, constricted nan magnitude of information this attack could handle. 

Now, ample connection models for illustration GPT aliases Gemini person enabled nan systematic study of societal media posts astatine unprecedented scale. "Large connection models person made it imaginable to do this benignant of study overmuch faster pinch a level of standardization that could beryllium difficult to execute before," says Sehgal. 

Unreported symptoms 

While nan organization nan researchers studied is admittedly not typical - Reddit users are younger, much apt to beryllium antheral and disproportionately based successful nan United States - nan symptoms described successful their corporate accounts mostly lucifer nan known broadside effects of semaglutide and tirzepatide: astir 44% of users successful nan study described astatine slightest 1 broadside effect, astir commonly immoderate shape of gastrointestinal distress. 

What stood retired was nan nontrivial percent of users who reported symptoms that whitethorn not beryllium afloat reflected successful existent supplier labeling aliases regular adverse-event reporting. Nearly 4% of users who reported broadside effects described reproductive symptoms, including menstrual changes specified arsenic intermenstrual bleeding, dense bleeding and irregular cycles. 

Others reported temperature-related complaints, specified arsenic chills, emotion cold, basking flashes and fever-like symptoms 

In addition, fatigue classed arsenic nan 2nd astir communal title among Reddit users, contempt reaching reporting thresholds successful comparatively fewer objective trials.

"These narcotics are thought to activity by engaging portion of nan encephalon called nan hypothalamus, which helps modulate a wide assortment of hormones," says Jena Shaw Tronieri, Senior Research Investigator astatine Penn's Center for Weight and Eating Disorders and a co-author of nan study. "That doesn't mean nan medications are needfully causing these symptoms, but it could propose that reports of menstrual changes and assemblage somesthesia fluctuations are worthy studying much systematically." 

Future directions

In nan adjacent term, nan researchers dream their findings will promote clinicians and researchers to return a person look astatine nan broadside effects patients are discussing online. "They're intelligibly connected patients' minds, and that's worthy paying attraction to," says Sehgal.

The squad besides hopes to grow nan activity beyond Reddit and beyond English-language communities to trial whether nan aforesaid patterns look crossed different platforms and populations. 

"We don't really cognize yet whether what we're seeing connected Reddit reflects nan acquisition of GLP-1 users globally, aliases whether it's peculiar to nan benignant of personification who posts connected Reddit successful nan United States," Ungar says. 

Ultimately, nan researchers judge this benignant of rapid, AI-assisted societal media study could go a useful measurement to spot early informing signs astir emerging narcotics and wellness trends. 

For substances that inclination quickly online, particularly those sold successful loosely regulated aliases unregulated markets, for illustration injectable peptides, diligent discussions connected platforms for illustration Reddit and TikTok whitethorn connection 1 of nan earliest clues to what users are really experiencing. 

"The full constituent of this benignant of attack is that it tin move quickly, and that's precisely erstwhile it's astir valuable," says Guntuku.

Source:

Journal reference:

Sehgal, N. K. R., et al. (2026). Self-reported broadside effects of semaglutide and tirzepatide successful online communities. Nature Health. DOI: 10.1038/s44360-026-00108-y. https://www.nature.com/articles/s44360-026-00108-y

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