Mice, cats, guinea pigs, and monkeys are among some of the animals used in laboratories to test pharmaceuticals to ensure their efficacy and safety for use in humans. There’s just one major flaw. Humans aren’t mice, cats, guinea pigs, or monkeys. So, drugs that may be safe in them can turn out to be harmful to us. For example, a drug trial of an Alzheimer’s vaccine that had been tested on mice had to be stopped because it caused brain inflammation in humans. And drugs harmful to mice, cats, guinea pigs, or monkeys may never get on the market yet may be just the cure that’s needed for a human-related diseases. Tamoxifen caused tumors in rats but fortunately tests were continued and it was found to be an effective drug against some human breast cancers.
Animal testing wastes many lives—not just those of the animals used in experiments but also the lives of humans. Some are harmed by what were considered harmless drugs and other suffer without drugs that could help them because they harmed laboratory animals. When you think about it…you’re not a mouse, a cat, a guinea pig, or a monkey. So why should the drugs you take be tested on them?