Drug FDA Class II Ongoing cGMP deviation

Unisom, SleepMelts, Diphenhydramine HCl tablets, 25 mg, Nighttime Sleep-Aid, 4 x 8 blister packs per carton, Cherry flavor, Manufactured by Adare Pharmaceuticals, Inc., Dist. by Chattem, Inc., P.O. Box 2219, Chattanooga, TN 37409, UPC # 0 41167 0014 0

Chattem Inc Published Mar 19, 2025

Risk level

Class II

May cause a temporary or reversible health problem; slight chance of serious harm.

Severity score 60/100

What should you do?

Check whether you have this product, using the lot codes, UPCs, and dates listed below.
Do not eat, serve, or sell the affected product.
Return it to the place of purchase for a refund, or throw it away in a sealed bag so people and animals can’t get to it.
Contact Chattem Inc or your place of purchase with questions, and see the source record below for full details.

Reason for recall

CGMP Deviations: Nitrosamine Drug Substance Related Issue impurity above the daily acceptable intake limit defined by the Food and Drug Administration.

Hazards

N-nitroso-diphenhydramine · primary

Affected products (1)

Unisom, SleepMelts, Diphenhydramine HCl tablets, 25 mg, Nighttime Sleep-Aid, 4 x 8 blister packs per carton, Cherry flavor, Manufactured by Adare Pharmaceuticals, Inc., Dist. by Chattem, Inc., P.O. Box 2219, Chattanooga, TN 37409, UPC # 0 41167 0014 0

180,696 cartons

Lot codes: 252807

Code info: Lot# 252807, Exp: 5/31/2025; 252808, Exp: 6/30/2025; 372560, Exp: 11/30/2025; 489576, 493447, Exp: 4/30/2026.

Affected areas

Nationwide

Timeline

Initiated

Mar 4, 2025
Published

Mar 19, 2025

Recall number: D-0266-2025
Agency: U.S. Food and Drug Administration
Country: US

Source data (openFDA JSON) About FDA enforcement reports

FDA records come from the openFDA drug enforcement-report dataset — the agency's full weekly enforcement list. Most entries are not issued as consumer press releases, so they won't appear on fda.gov/recalls or in a web search. The source record link above resolves this exact recall by its number.