ChatterBank1 min ago
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For more on marking an answer as the "Best Answer", please visit our FAQ.I would say the difference is, for eg.. If you had a known condition ie. Breast cancer and was given a drug eg.Herceptin that would be a clinical trial as in the patient has a condition and you are testing the response to a new drug. If someone just tests a drug they have no physical symptoms/condition which the drug is been tested for. Healthy volunteers against patients with established disease.
Clinical trials are used for a whole range of products other than drugs. Clinical trials are used for new types of devices (catheters, medical lasers, replacement joints, breast implants, bone replacement substances and 10,000 other devices. Clinical trials are required prior to placing on the market a "new technology or a new application of an existing technology". A successful outcome of a clinical trial will show that the benefit outweighs the risk for a particular device and a particular medical condition. Hope this helps.