The take of one article, there are a good many out there, on this question.
But first,
"Why You See Such Weird Drug Commercials on TV All the Time"
https://www.thrillist.com/health/nation/why-are-prescription-drug-advertisementss-legal-in-americaSUMMARY:
Pharma TV ads pressure us to ask our doctors for drugs for all kinds of ailments, using ads with happy people in all kinds of odd settings. Doctors should be telling patients what to take, not patients telling doctors what they want. The FDA was created to regulate out-of-control drug companies using questionable sales tactics. Direct-to-consumer drug marketing, a multi-billion dollar business, was first allowed in the U.S. in 1985. Further relaxing of TV ad rules in 1997. The AMA has urged banning of such ads.
QUOTES FROM ARTICLE:
" ... it's worth asking how we became a nation that can from one side of the mouth declare a war on drugs, and from the other spew ad copy telling people to take drugs."
" ... this (early 20th century) was the era of patent medicines, a time when charlatans hawked cure-all snake oil tonics. One drug, for example, was marketed as a post-surgical antiseptic, then a floor cleaner, then a cure for gonorrhea, before it finally succeeded as a breath freshener -- today you can still buy Listerine in pretty much any pharmacy when you need to amp up your oral hygiene. Don't you miss the days when your floor cleaner could turn into a mouthwash?"
" ... the average patent medicine was a thinly veiled intoxicant, garnished by herbs with spotty medical benefits. Case in point: Lydia E. Pinkham's Vegetable Compound, which was meant to treat menstrual cramps, and contained ... about 25% alcohol."
"Despite its lofty ambitions, the FDA was relatively toothless until 1962, when Congress endowed the FDA with some real power to ensure that drug companies didn't make false claims."
" ... a growing proliferation of ads is driving demand for expensive treatments despite the clinical effectiveness of less costly alternatives."
" ... the drug industry is still one of the most profitable in the world. It would likely do just fine without the ads."And
"Can You Trust TV Ads for Cancer Drugs?"
https://www.peoplespharmacy.com/articles/can-you-trust-tv-ads-for-cancer-drugsSUMMARY:
A reference to the "This Is Your Brain on Drugs" commercial. TV drug ads are legal only in the U.S and New Zealand, and are controversial. Doctors have the training, so it's ridiculous for patients to tell them what drugs they want to take. Analysis of a TV cancer drug TV commercial, showing how it can be legal but at the same time also deceptive. TV viewer can't know if his specific cancer can respond to the particular drug being hyped on TV.
QUOTES:
" ... a spokeswoman for PhRMA, the pharmaceutical manufacturers trade association, said that advertisements help patients make better decisions. Drug makers are ‘designing their advertising to provide scientifically accurate information to help patients better understand their health care and treatment options." Article questions this.
"Patients should not be expected to make therapeutic decisions based on short TV ads for cancer drugs. After all, doctors need years to master the best treatments for complicated conditions. How can patients determine if a medication they see advertised for 60 to 90 seconds is right for them?"Just a couple of examples of articles looking into how TV drug ads can be questioned, as to their purpose and value.
There are many aspects of this and approaches to this discussion. This thread looks at just a few of them.