The acute form of hepatitis, generally caused by viral infection, is characterized by constitutional symptoms that are typically self-limiting. Chronic hepatitis presents similarly, but can manifest signs and symptoms specific to liver dysfunction with long-standing inflammation and damage to the organ.
1 Hydromorphone is a minor metabolite of morphine and may be excreted in urine at concentrations up to 2.5% of the morphine concentration. 2  Consequently, the detection of minor amounts of hydromorphone in urine containing high concentrations of codeine should not be interpreted as evidence of hydromorphone use.
Existing products combine the drug with nonaddictive painkillers such as acetaminophen. Hydrocodone belongs to family of drugs known as opiates or opioids because they are chemically similar to opium. They include morphine, heroin, oxycodone, codeine, and methadone. Critics are especially worried about Zohydro, a timed-release drug meant for managing moderate to severe pain, because abusers could crush it for an intense, immediate high.