Please, please, please! Always, and forever dilute promethazine when it is to be given IV. Our ER POLICY was that it must always be diluted in 5 ml NS saline and administered slow IVP, even when given into a wide-open line (as in 1000cc NS WO). After this policy was instituted, we never had the problem of sensitivity or patient complaints arise again. I would also caution anyone giving this medication to an elderly person to ask the MD if they might cut the dose in half, or use something else (such as Reglan), as I have seen some elder folks become positively wild, and nearly uncontrollable when this drug was administered.
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