Facebook ads push misinformation about HIV prevention drugs.

A pharmacist pours Truvada pills back into the bottle. Personal-injury lawyers have purchased Facebook ads about this medication to recruit plaintiffs in lawsuits about its side effects. But LGBT groups and health experts say the ads are misleading and give the false impression that the drug is likely to cause serious harm to everyone who takes it. (Justin Sullivan/Getty Images)

Facebook users have been bombarded with misleading ads about medication meant to prevent the transmission of HIV, according to lesbian, gay, bisexual and transgender advocates, who say the tech giant’s refusal to remove the content has created a public-health crisis…