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Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model

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Published on: September 7, 2013

Transdermal clonidine skin reactions.

L Michael Prisant¹

¹Department of Medicine, Section of Cardiology, Hypertension Unit, Medical College of Georgia, 1120 15th Street, Augusta, GA 30912, USA.

Journal of Clinical Hypertension (Greenwich, Conn.)

|April 3, 2002

Summary

The clonidine transdermal system effectively treats blood pressure with fewer systemic side effects than oral clonidine. However, localized skin reactions are common and increase with dose and duration, necessitating awareness for safe transdermal drug delivery.

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Area of Science:

Pharmacology
Dermatology
Cardiovascular Medicine

Background:

Clonidine transdermal system is a therapeutic option for hypertension.
Systemic side effects are generally less frequent compared to oral clonidine.
Localized skin reactions are a significant concern with transdermal clonidine use.

Purpose of the Study:

To evaluate the incidence and characteristics of skin reactions associated with the clonidine transdermal system.
To compare systemic versus localized side effects of transdermal versus oral clonidine.
To assess the impact of hydrocortisone pretreatment on skin irritation and drug absorption.

Main Methods:

Review of clinical data on patients using clonidine transdermal systems.
Documentation of common and less frequent skin reactions, including erythema, scaling, vesiculation, excoriation, induration, allergic contact dermatitis, hyperpigmentation, and depigmentation.
Analysis of dose and duration effects on reaction incidence.
Evaluation of outcomes with 0.5% hydrocortisone pretreatment.

Main Results:

Localized skin reactions, such as erythema, scaling, and induration, are frequent with transdermal clonidine.
The incidence of skin reactions escalates with increased dose and duration of therapy.
Allergic contact dermatitis, hyperpigmentation, and depigmentation are also reported.
Hydrocortisone pretreatment correlated with reduced skin irritation and enhanced systemic absorption.

Conclusions:

Transdermal clonidine presents a viable alternative for blood pressure management, offering reduced systemic side effects.
Frequent localized skin reactions necessitate careful monitoring and management strategies.
Understanding these dermatological effects is crucial for optimizing transdermal clonidine therapy, even as oral formulations are less common for hypertension.