Hydroxyzine for Pruritus Management

Mechanism and Indications

Hydroxyzine, a first-generation antihistamine, relieves pruritus by blocking H1 receptors and has sedative properties beneficial for nighttime itching, as recommended by the American Academy of Dermatology 1, 2

The American Academy of Dermatology recommends hydroxyzine for nighttime use in patients with pruritus due to its sedative properties, while non-sedating second-generation antihistamines are preferred for daytime use 1, 2, 3
Hydroxyzine can be used for cancer therapy-related pruritus, as suggested by the National Comprehensive Cancer Network 1, 2
The British Association of Dermatologists recommends hydroxyzine for generalized pruritus of unknown origin (GPUO) in short-term or palliative settings 4

The British Association of Dermatologists suggests that hydroxyzine significantly improves symptoms of pruritus and quality of life in patients with chronic pruritus when used as a nighttime medication to complement daytime non-sedating antihistamines 5, 6
Dose adjustments are necessary in patients with renal impairment, with the dose halved in moderate renal impairment, as recommended by the National Kidney Foundation 5, 7

The American Academy of Dermatology recommends avoiding hydroxyzine in severe liver disease due to inappropriate sedating effects 5, 7
The American College of Obstetricians and Gynecologists contraindicates hydroxyzine in early stages of pregnancy 5, 6
The American Geriatrics Society recommends avoiding hydroxyzine in elderly patients with cognitive impairment due to anticholinergic effects 8, 4

The American Academy of Dermatology recommends a treatment algorithm for pruritus, with non-sedating second-generation antihistamines as first-line for daytime itching and first-generation antihistamines like hydroxyzine for nighttime itching 1, 2
For inadequate response, consider increasing dose, adding H2 antihistamines, or switching to alternative treatments, as suggested by the British Association of Dermatologists 5, 6