Which medicine for arthritis is most effective?

Arthitis medicine. The definition of arthritis is deceptively simple: an inflammation that involves one or more joints. More than 100 diseases fit this description, from the simplest inflammation in one joint to complex autoimmune diseases. Most common used madication are:nonsteroidal anti-inflammatory drugs (relafen, voltaren, Mobic (meloxicam) and ibuprofen, celebrex, vioxx and Bextra and Aspirin and magnesium salicylatethank.
There's a bunch. Tylenol (acetaminophen) is considered the first-line pain reliever for its overall safety and efficacy unless you have a liver problem. Non-steroidal anti-inflammatories (nsaid's) such as ibuprofen, naprosyn, alleve, motrin, etc are also commonly used. Two supplements, glucosamine and chondroitin, have also been shown to be effective.
Depends. This is a difficult question to answer, there is no "best medicine" that fits everyone. This is why you go to a doctor. He/she will determine what medicine or treatment is best for you based upon your age, medical history, presence of other medical conditions etc. For instance, medications like Ibuprofen or Naproxen can be dangerous in older people with kidney disease and heart disease.