"... In the
United States, codeine is regulated by the
Controlled Substances Act. Federal law dictates that codeine be a Schedule II controlled substance when used in products for pain-relief that contain codeine alone or more than 90 mg per dosage unit.
Tablets of codeine in combination with aspirin or acetaminophen (
paracetamol/
Tylenol) made for pain relief are listed as Schedule III; and cough syrups are Schedule III or V, depending on formula. The acetaminophen/codeine pain-relief elixir (trade name
Tylenol Elixir with Codeine) is a Schedule IV controlled substance.
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Some states have chosen to classify Schedule V codeine preparations into a more restrictive schedule in order to cut down the abuse of prescription codeine preparations. Minnesota, for instance, has chosen to reclassify Schedule V codeine preparations (such as
Cheratussin) as a Schedule II controlled substance.
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Preparations for cough or diarrhea containing small amounts of codeine in combination with two or more other active ingredients are Schedule V in the US, and
in some states may be dispensed in amounts up to 4 fl. oz. per 48 hours (one or two states set the limit at 4 fl. oz. per 72 hours)
without a prescription. ... "
https://en.wikipedia.org/wiki/Codeine#United_States
I guess I shouldn't believe everything I read on Wikipedia. :)