Any American with a television has, by now, surely seen commercials for online pharmacies advertising GLP-1s and other popular prescription weight-loss medicines at bargain prices. You know the ones, where retired tennis stars or comedians you haven’t seen in 10 years tell you how wonderful, and easy to procure, these life-changing medications are.

It's a huge business. Of the one in eight American adults who takes these drugs, 11 percent were prescribed and issued meds from online telehealth services, leading to a massive 24 percent projected annual growth rate in the sector. Some forecasters have predicted that the online weight-loss-drug market will grow to $150 billion in the next five years. The government is even getting in on the action with the recent launch of TrumpRx. Given the demand, the growth of the sector, and the sometimes spurious business practices that emerge when drug dealing is combined with the internet, it is perhaps unsurprising that not all the purveyors in the space are operating in good faith.

Some users have signed up for these services, submitted credit card data for a relatively modest membership fee, and woken up to massive credit card charges for GLP-1 meds they did not request. These meds are then shipped immediately, allegedly preventing the provider from reversing or canceling orders. When contacted, the companies will say they cannot accept returns or cancellations, citing vague “privacy” and “supply chain” concerns. Efforts to escalate these concerns are frustrated by managers who seem to always be tied up in meetings. Despite persistent calls, patients are left paying massive sums for meds they don’t even want.

I know, because it happened to me.

In March, I signed up for a service called FitRx—which also does business under the name Zealthy, Inc.—mostly to see the cost of compounded Zepbound. The website advertises an offer of $135 for a month’s supply. I registered, paid the membership fee, and answered some basic questions about my weig...