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How long does a doctors prescription last if not filled?

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Wiki User
September 11, 2008 6:06AM

usually six months unless it's a controlled i.e. morphine, pethidine and methadone. These medicines are often misused, so have stricter legal controls on their supply to prevent them being obtained illegally. A prescription for a controlled drug is valid for 28 days from the date given on the prescription.