For moderate kidney failure, the use of iodinated contrast should be avoided; this may mean using an alternative technique instead of CT . Those with severe renal failure requiring dialysis require less strict precautions, as their kidneys have so little function remaining that any further damage would not be noticeable and the dialysis will remove the contrast agent; it is normally recommended, however, to arrange dialysis as soon as possible following contrast administration to minimize any adverse effects of the contrast.
42.
The banned items include carbon tetrachloride ( CCL4 ), which carries the code number of 2903.14.000 in the government customs tariff book; trichloroethane or methyl-choloform ( CH3CC13 ), numbered 2903.19.00; fluorinated, brominated or iodinated derivatives of acyclic hydrocarbons ( CH3BR ), designated as 2903.30.000; trichlorofluoromethane ( CFC-11 ), identified as 2903.41.000; and dichlorodifluoromethane ( CFC-12 ), numbered 2903.42.000.
43.
Along with the similar 2-iodomorphine as well as iodinated analogs of dihydromorphine, dihydrocodeine, heroin, and the fluorinated, chlorinated, and brominated analogues of this series, this change may not impact the activity of the drug to a notable extent but 1-and 2-iodomorphine are used in pharmacological, neurological, metabolic, and endocrine research as it allows the tagging of morphine with iodine-131 or iodine-129 . Such research was important in the discovery of opioid receptors in the central nervous system, peripheral nervous system, and other tissues in humans, mammals, birds, and some reptiles, amphibians, fish, insects, and arthropods.
