Natural gas also offers a potential solution to our dependence on expensive foreign oil to power our automobiles.

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Schedule IV is on the weaker end of the five controlled substances classifications and is reserved for drugs with some low potential for abuse and dependence.

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If the panel's advice is adopted by FDA, it would put hydrocodone on par with prescription painkillers like oxycodone, morphine, and methadone -- drugs with high abuse potential that can lead to severe physical dependence.

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