Apparel retailers could see an up to $13 billion annual boost in spending because of GLP-1 drugs, according to an estimate by equity research firm Bernstein.

CNBC spoke with five U.S. patients who recently started the pill following its launch and have varying initial experiences with the drug.

Apparel retailers could see an up to $13 billion annual boost in spending because of GLP-1 drugs, according to an estimate by equity research firm Bernstein.