Primates at Black Beauty Ranch. This is Daisy, a Long tail Macaque.

Photo by Humane World for Animals

Tell Congress to block funding for more monkey experiments!

Monkeys in laboratories spend their days in barren cages—except when they are being subjected to terrifying and often painful experiments. These inquisitive and social animals may be force-fed potentially toxic substances, infected with diseases, or immobilized in restraint chairs for hours on end.

Recently, the Senate Appropriations Committee earmarked an additional $30 million for the National Institutes of Health to fund these outdated experiments. We need your help to make sure that these funds—which support animal suffering and waste your tax dollars—do not make it into the final appropriations bill.

Primates have historically been used with the hope of improving human health and safety, but animal experiments not only cause immense suffering for animals in laboratories—they can also hinder advances in human healthcare because testing on animals often cannot give us accurate information about human conditions. In contrast, non-animal research methods can more accurately predict how the human body will respond to drugs, treatments, and substances because they are based on human biology, cells, and tissues.

Please join us in urging Congress to prevent expanded funding for monkey experiments in the Fiscal Year 2026 Labor, Health and Human Services Appropriations bill.

TAKE ACTION 

Please use the form below to send a message to your U.S. Representative and two U.S Senators asking them to prevent additional tax dollars from being used to support experiments that have limited value and cause suffering to tens of thousands of monkeys in U.S. laboratories every year. Be sure to edit your message so it stands out.

This action alert is for U.S. residents.

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Dear Legislator,

Dear Legislator, As your constituent, I urge you to reject funding for the National Institutes of Health to expand non-human primate research infrastructure in the FY26 Labor, Health and Human Services appropriations bill.

In addition to causing immense suffering, primate experiments have largely failed to provide any significant advances in human health. Close to 90% of drugs tested on animals, including primates, ultimately fail in human trials. These experiments have already wasted hundreds of millions of taxpayer dollars, when investing in non-animal methods could yield far better results for human health.

Non-animal methods based on human cells, tissues or data can more accurately predict how the human body will respond to drugs and treatments. In one example, the largest organ-chip study conducted to date demonstrated that liver chips correctly detected human liver toxicity in more than 85% of drugs. Animal testing had previously indicated that these drugs were not toxic, leading to liver damage that was sometimes fatal for human patients.

Continued investment in human-specific technologies will vastly accelerate our understanding of human diseases and conditions and ultimately replace animal experiments. It also aligns with NIH’s initiative to expand innovative, human-based science while reducing animal use in research.

With hundreds of millions of taxpayer dollars already being spent on ineffective primate research every year, now is not the time to allocate additional funds to support monkey experiments.

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