Eli Lilly launched an ad campaign on Friday, cautioning patients against the risks of unapproved weight-loss drugs in its latest attempt to fend off competition from copies of its weight-loss drug.

Eli Lilly said Wednesday it will build three manufacturing plants in the United States to make the key raw ingredients in its medicines, a push to bring home a critical part of the pharmaceutical supply chain that largely comes from foreign sources.

The company is doubling plans for capital spending on U.S. factories as President Donald Trump pressures the pharma industry to reshore drug production.