P-listed wastes (40 CFR Part 261.33(e)) are commercial chemical products categorized as acutely hazardous under RCRA. One of the primary criteria for including a drug on the P-list as acutely hazardous is an oral lethal dose of 50 mg/kg (LD50) or less. LD50 is the amount of a material, given all at once, which causes the death of 50% of a group of test animals. There are currently seven chemicals on the P-list that are used as pharmaceuticals:
- Arsenic trioxide: P012
- Epinephrine base: P042 (but not epinephrine salts)
- Several states still consider all forms of epinephrine as HW
- Nicotine: P075
- Phentermine (CIV): P046
- Physostigmine: P204
- Physostigmine salicylate: P188
- Warfarin >0.3%: P001