Currently, use of oral dapsone is generally limited to more severe forms of skin disease, as its use may be associated with hematologic side effects, including hemolysis and hemolytic anemia that are dose-dependent and occur more 15 frequently with increasing dose (Zhu and Stiller 2001; Jollow et al., 1995).
Some 30 preservatives useful in this invention include methylparaben, propylparaben, butylparaben, chloroxylenol, sodium benzoate, DMDM Hydantoin, 3-Iodo-2- Propylbutyl carbamate, potassium sorbate, chlorhexidine digluconate, or a combination thereof.
15 In a more preferred embodiment, the dermatological composition that is applied comprises about 0.85% carbomer, about 66.95% water, about 25% diethylene glycol monoethyl ether (i.e., ethoxydiglycol), about 0.2% methylparaben, about 5% dapsone, and about 0.2% sodium hydroxide solution.
Thus, the carrier system described herein, 5 which can be adjusted to optimize the delivery profile for the pharmacology of the active drug and the nature of the disease state, advances the effectiveness of pharmaceutical products applied to the skin of G6PD-deficient patients.
Furthermore, the low haptoglobin was present at the baseline blood test as well as week 12, and no other changes in the other hematology parameters occurred, so the laboratory adverse events for this subject are likely not related to dapsone gel treatment.