RT Book, Section A1 Wang, Richard Y. A2 Hoffman, Robert S. A2 Howland, Mary Ann A2 Lewin, Neal A. A2 Nelson, Lewis S. A2 Goldfrank, Lewis R. SR Print(0) ID 1108438781 T1 Special Considerations T2 Goldfrank's Toxicologic Emergencies, 10e YR 2015 FD 2015 PB McGraw-Hill Education PP New York, NY SN 9780071801843 LK accesspharmacy.mhmedical.com/content.aspx?aid=1108438781 RD 2024/04/19 AB Extravasation injuries are among the most consequential local toxic events. When certain chemotherapeutics leak into the perivascular space, significant necrosis of skin, muscles, and tendons can occur with resultant loss of limb or function. The initial manifestations may include swelling, pain, and a burning sensation that can last for hours. Days later, the area can become erythematous and indurated, followed by resolution or progression to ulceration and necrosis.35 These early findings can be difficult to distinguish from other forms of local drug toxicity, such as irritation and hypersensitivity, which can result from the chemotherapeutic or its vehicle (ethanol, propylene glycol). For example, fluorouracil, carmustine, cisplatin, and dacarbazine are considered as local irritants. The local irritation and hypersensitivity manifestations are self-limiting and typified by an immediate onset of a burning sensation, pruritus, erythema, and a flare reaction of the vein being infused. Hypersensitivity reactions are reported with daunorubicin, doxorubicin, idarubicin, and mitoxantrone. Pretreatment with an antihistamine can prevent some of the hypersensitivity manifestations.43 When a local reaction cannot be differentiated from an extravasation, it is prudent to presume extravasation has occurred and manage the situation accordingly.