The U.S. Food & Drug Administration (FDA) regulates cancer drugs and devices, both for use by humans and pets. Such drugs and devices must obtain FDA approval or clearance before they can be marketed or sold to consumers, so that the FDA can ensure each product is safe and effective for its intended use.

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Richard L. Cupp, Pepperdine University, writes for The Conversation:

My reaction to the killing of Harambe the gorilla at the Cincinnati zoo when a child went into the gorilla’s enclosure is probably typical: I am sickened and I am angry. This must not happen again.

One step that some advocates will surely