Animal experiments are widely used to develop new medicines and to test the safety of other products. Many of these experiments cause pain to the animals involved or reduce their quality of life in other ways. If it is morally wrong to cause animals to suffer then experimenting on animals produces serious moral problems. Animal experimenters are very aware of this ethical problem and acknowledge that experiments should be made as humane as possible. They also agree that it's wrong to use animals if alternative testing methods would produce equally valid results. The case for animal experiments is that they will produce such great benefits for humanity that it is morally acceptable to harm a few animals. The equivalent case against is that the level of suffering and the number of animals involved are both so high that the benefits to humanity don't provide moral justification.

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