Hexyl-nicotinate-induced vasodilation in normal human skin.

Hexyl nicotinate in a lotion formulation was applied topically to the skin of 10 healthy volunteers with clinically normal skin. Erythematous responses were assessed visually and skin blood flow determined by means of a laser Doppler flow meter which measures the blood cell flux (Pf2 Perimed, Sweden). Mean erythematous responses and increased blood cell flux were dose-related but in several subjects increases in blood flow occurred in the presence of barely detectable erythematous responses. In some subjects, hexyl nicotinate may be an effective cutaneous vasodilator even in the presence of minimal erythema.