Some ads can be more than misleading they can put your health at risk.

Last year, ads paid for by law firms and legal referral companies started cropping up on Facebook. Typically, they linked Truvada and other HIV-prevention drugs with severe bone and kidney damage.

But like a lawsuit, these assertions do not always reflect the consensus of the medical community. They also do not take into account the benefit of the drug or how often the side effects occur.

On Dec. 30, Facebook said it disabled some of the ads after more than 50 LGBTQ and HIV/AIDS groups signed an open letter to Facebook condemning them for scaring away at-risk HIV negative people from the leading drug that blocks HIV infections.

Based on our research involving televised drug injury ads, advocacy groups are right to raise the alarm about how these ads might affect important health decisions.

Although drug injury ads are selling legal services, thats rarely obvious, making it harder for consumers to invoke their usual skepticism toward medical information from lawyers.

Here are a few deceptive tactics we noticed in the Facebook Truvada ads, which you can also spot in drug injury advertisements more broadly.

Advertisements in this genre sometimes masquerade as other types of content, like public service announcements or local news. For example, a series of identical Truvada-related ads sponsored by Lawsuit Watch and Advocate Alliance Group prominently featured video from a local news story.

This clever but ultimately misleading tactic is known within the marketing literature as an Omega strategy, in which the advertiser tries to redefine the sales interaction to disguise its pitch. Its like when insurance companies offer to assess your personal risk, when theyre really just trying to sell you insurance.

An example of Facebook ads about HIV-prevention drug Truvada. Screenshot by author of Facebook ad bank

Similarly, these legal advertisers appear to be educating patients but their true goal is to sign you up for a lawsuit and most likely sell your name to a lawyer looking for clients.

What makes the ad even more complex to process is that embeds actual local news footage, which mostly consists of reporting allegations from a lawsuit.

By using news broadcasters to deliver their claims, the advertiser enhances the messages credibility, which makes it less likely that consumers will critically analyze the content.

Drug injury ads can also mislead when the sponsors are not clearly identifiable as for-profit legal referral businesses.

For example, some Truvada-related ads that Facebook removed were sponsored by A Case for Women, whose name suggests an advocacy organization. The Facebook page for this entity does little to clear up this misapprehension. Its only when you track down its website that you get a whiff of legalese, with references to a free consult and the advice to take action (legal or otherwise) for life-changing financial compensation. Even then, the information is presented in the name of Women Empowerment, along with inspirational pictures and blog posts.

READ: What Trumps PrEP deal means for the spread of HIV

The same kind of confusion can arise from ad sponsors with names like Lawsuit Watch and Advocate Alliance Group.

Its not obvious that this ad sponsor is a legal referral agency soliciting consumers to sue drug manufacturers. Facebook ad bank

Consumers are misled when advertisers do not clearly disclose their status as law firms or for-profit legal referral businesses. In one experiment for a study published last year, we showed consumers different versions of drug injury TV ads. Around 25% of consumers did not recognize drug injury advertising as such when the sponsor was not clearly revealed, compared with 15% when an attorney was prominently featured. By contrast, only 2% of consumers misidentified the source of a pharmaceutical ad.

This confusion appears to alter how consumers process information found in the ads. Those who were shown the more deceptive drug injury ad perceived the featured drug to be riskier, expressed a greater reluctance to take the drug and were more likely to question their doctor about the medication.

When youre dealing with medication that prevents a life-threatening virus like HIV, transparency is essential.

Drug injury advertisements also commonly include stark language and imagery like consumer alert, medical alert or warning. This language is used to capture a viewers attention. We have found that drug injury advertisements with more graphic descriptions of side effects inflate perceptions of risk.

These ads characterize Truvada as dangerous. Facebook ad bank

Language of this sort can be found in the Facebook ads about Truvada. Some ads are framed as a Truvada NRTIs Drug Alert, claiming that the manufacturers had a safer drug & kept it secret all while they kept selling the dangerous one.

But as the authors of the open letter to Facebook point out, characterizing this particular drug as unsafe is not accurate, particularly when compared with the obvious harm of HIV infection.

Moreover, framing ads in this way is not necessary. Advertisers could instead state they are looking for individuals who have experienced the listed side effects without portraying the ad as an alert that the drug is dangerous.

These types of ads have been almost entirely unregulated until recently.

The Federal Trade Commission, which regulates advertising, declined to act for many years. But in September, the agency issued a letter to seven law firms and legal referral companies warning them that their advertising is deceptive, suggesting it may be finally changing its tune.

And although states regulate legal advertising through attorney ethics rules, our past research found no examples in which a lawyer was disciplined for misleading drug injury ads.

The last line of defense, then, is Facebook itself, through its ad policies. Beyond blocking misleading ads, our research suggests that clear disclaimers can help to reduce but not eliminate consumer confusion.

Ultimately, its up to federal and state regulators to treat drug injury advertisements as a matter of public health and require advertisers to present medical information in a way that helps, rather than misleads, consumers.

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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How to spot deceptive drug injury ads like the ones Facebook just disabled - PBS NewsHour