Other nephrotoxic drugs should be avoided. Nephrotoxicity is usually reversible and can be reduced by dosage adjustment and adequate hydration. Electrolyte disturbances — hypocalcemia and hypomagnesemia can occur and regular monitoring of electrolytes is necessary to avoid clinical toxicity. Genital ulceration — a less common reported side effect which occurs more in men and usually during induction use of foscarnet. It is most likely a contact dermatitis due to high concentrations of foscarnet in urine. It usually resolves rapidly following discontinuation of the drug. CNS — less common side effects of perioral paresthesia, irritability and altered mental states. References
Sources
Dennis L. Kasper, Eugene Braunwald. "Harrisons Manual of Medicine", 16th Edition, Mcgraw-hill, (2005), p. 2244. External links
"Foscarnet". Drug Information Portal. U.S. National Library of Medicine. "Foscarnet sodium". Drug Information Portal. U.S. National Library of Medicine.
Subcutaneous fat necrosis of the newborn  is a rare form of lobular panniculitis occurring in newborns that is usually self-remitting and non-recurring. Proposed causes include perinatal stress, local trauma, hypoxia and hypothermia, though the exact cause is unknown. It has been suggested that the brown fat seen in newborns is more sensitive to hypoxic injury than fat seen in adults, and that such hypoxia, usually in the context of a complicated birth, leads to the fat necrosis. Complications can include hypercalcemia, hyperlipidemia, dehydration, hypoglycemia, seizures, vomiting,  constipation, and thrombocytopenia, and can present months after the onset of SCFN symptoms. : 490

See also
Pancreatic panniculitis
Panniculitis

References
External links

eMedicine entry for Subcutaneous fat necrosis of the newborn