More than 47 percent of people view their pets as family members, according to a 2002 American Veterinary Medical Association survey. It makes sense then that people are routinely treating their pets for ailments that might strike a family member -- like arthritis, heart disease, diabetes, allergies, dementia, obesity, and yes, cancer.

New studies show that Americans are stuffing their pets with more drugs than ever before. They are medicating their dogs, cats, and sometimes other pets as much as they medicate themselves -- and they are doing it with many of the same human drugs they use for themselves, like steroids for inflammation, antibiotics for infection, anti-depressants for anxiety, and even new slendering drugs for obesity.

It's a big market -- pharmaceuticals for pets -- and for those who love their pets so much they can't let go, going to extremes is worth every penny.

Think about this:

    * For dogs and cats alone, Americans spent $2.9 billion on pet drugs in 2005. While this is equal to only one percent of human drug sales, the market has grown by half since 2000.

    * The U.S. Food and Drug Administration (FDA) has approved more than 40 new pet drugs in the past five years.

    * A single three-month course of pet chemotherapy can cost $3,000 -- and chemotherapy doesn't typically extend the life of an animal as much as it soothes symptoms of the disease.


    * Health insurance for pets was nearly invisible in 2002 but has gained popularity over the past few years. Premiums can cost $30 per month, and the total market is expected to climb to $500 million in the next five years.

    * Some human drugs leave pets with unexpected, sometimes deadly, side effects. The drug Rimadyl, made by Pfizer and used as a treatment for dogs with arthritis, has been shown to cause kidney and liver damage in some animals. More than 3,000 pet deaths have been attributed to this drug.

    * Some question the priorities of a society that allows for medically treating pets like they are humans. Dianne Dunning, an ethicist at N.C. State's vet school is concerned that millions of animals are lost, unwanted, and euthanized while millions are spent on pet medicines. David Rothman, an expert in medicine's role in society from Columbia University, says, "If you can't get malaria drugs in some Third World countries, what are we doing with chemotherapy for cats?"

    * Others don't flinch at the expense it requires to keep their pets alive. One man, whose dog was expected to die of lymphoma within weeks, still enjoys the company of his pet some two years later. Chemotherapy saved the dog's life and when asked if he thinks the drugs are too expensive, this man says NO -- because his dog is still here.