openFDA
Public FDA data about drugs, devices and foods
Medical platform which allows the development of applications for different healthcare scenarios.
Orion Health API is a free Health API that requires OAuth authentication, is served over HTTPS and has unconfirmed CORS support.
Leverage the power of our Open APIs and our FHIR capabilities to enable the best applications to be developed for every healthcare scenario
Details from developer.orionhealth.io.

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Public FDA data about drugs, devices and foods
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The Orion Health API is provided by Orion Health Developer Portal (developer.orionhealth.io). Leverage the power of our Open APIs and our FHIR capabilities to enable the best applications to be developed for every healthcare scenario
Yes. The Orion Health API is listed in the Health category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Orion Health API uses OAuth authentication, so you need to register for credentials before making requests.
CORS support for the Orion Health API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Orion Health API is served over HTTPS, so it's safe to use in production.