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The basic porphyrin structure is composed of four pyrrole rings linked by methene bridges. The compounds that originally condense to form the pyrrole structure porphobilinogen are:

An analgesic that alleviates pain without causing loss of consciousness, and its toxic effect can result in hepatic necrosis.

Which of the following classes of compounds has a sedative effect and as such is used to treat anxiety?

A 30-year-old male with ALA-dehydratase deficient porphyria (ADP) may have which of the following clinical features:

The toxin that inhibits cyclooxygenase, interfering with platelet aggregation, and can cause a mixed acid-base balance is:

A drug of abuse that stimulates the central nervous system by blocking dopamine reuptake and rapidly metabolizes to inactive benzoylecgonine and ecgonine methyl ester is:

CEA is most commonly associated with:

Which one of the following hormones is responsible for normal development of cartilage and bone, mobilizing fat stores, and stimulation of protein synthesis?

There is no endocrine hormone from which of the following chemical classes?

Which of the following is a major active metabolite of procainamide that must be monitored along with the parent drug?