Fentanyl patches come in four strengths, 25mcg, 50mcg, 75mcg, and 100mcg. The strength for the patches is actually expressed as mcg/hour, meaning with fentanyl 25mcg patches, 25mcg of fentanyl is delivered every hour for 72 hours. The total mcg in the patch would be more than 25 x 72, as they expect to have a little med left over after the 3 days. These are very potent, and not intended for oral consumption. Be very careful.
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