- Sodium Sulfacetamide Lotion 10% is AB-Rated to sanofi-aventis’ Klaron

CINCINNATI; January 16, 2007—Prasco Laboratories, a Cincinnati-based generic pharmaceutical
company, announced today it has begun shipping Sodium Sulfacetamide Lotion 10%, the authorized
generic of sanofi-aventis’ Klaron®1. Sodium Sulfacetamide Lotion 10% is AB-rated to Klaron and is
indicated in the topical control of acne vulgaris.

“We are excited about the expansion of the Prasco dermatological product line with the Sodium
Sulfacetamide Lotion 10% product,” said Prasco vice president of communications & marketing services,
Kimberly Carroll. “As a Prasco Authorized Generic, Sodium Sulfacetamide Lotion 10% will provide
patients with the identical experience, quality and features as the brand product.” Carroll concluded.

About Sodium Sulfacetamide lotion
Sodium Sulfacetamide lotion 10% is indicated in the topical treatment of acne vulgaris. Adverse reactions
in clinical trials were infrequent and, as with other drugs used in the topical treatment of acne, were
restricted to local irritation, stinging, and burning. Severe reactions, such as Stevens-Johnson syndrome
and toxic epidermal necrolysis, have occurred with suflonamides.

About Prasco
Sodium Sulfacetamide Lotion 10% is the latest product from Prasco in its rapidly growing Authorized
Generics program. Prasco’s mission is to provide both quality products and significant cost-savings to the
consumer. Our goal is to provide patients with an identical brand experience through Prasco Authorized
Generics, which are generic products manufactured by brand companies and marketed as generics
under the Prasco label. The Prasco product line is currently sold through the major distribution channels,
including chains, independent pharmacies, distributors, wholesalers, and managed care providers.

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CONTACT:
Kimberly Carroll, Vice President Communications & Marketing Services
Prasco Laboratories
513-618-3333
website: www.prasco.com
www.authorizedgenerics.com

1 Klaron,® is a registered trademark.