[Posted 11/17/2017]
AUDIENCE: Pharmacy, Risk Manager, Patient
ISSUE: Greenstone, a wholly owned subsidiary of Pfizer Inc., is voluntarily recalling multiple lots of diphenoxylate hydrochloride and atropine sulfate tablets, USP to the consumer level. Greenstone initiated this recall because product from these lots has the potential to be super potent or sub potent. Products were distributed nationwide to wholesalers/retailers from November 2016 through June 2017 in the United States. See the recall notice for affected lot numbers.
The use of this product in patients with uncontrolled diarrhea due to chronic medical conditions may predispose the patient to toxicity from either the diphenoxylate or atropine components. The product label states that over dosage can be life-threatening and symptoms may include opioid and/or anticholinergic effects including respiratory depression, coma, delirium, lethargy, dryness of the skin and mucous membranes, mydriasis or miosis, flushing, hyperthermia, tachycardia, hypotonia, tachypnea, toxic encephalopathy, seizures and incoherent speech. Respiratory depression has been reported up to 30 hours after ingestion and may recur despite an initial response to narcotic antagonists. The use of the impacted super potent product when used as labeled has a low probability of being associated with adverse events of limited severity such as lethargy, skin flush, and drowsiness. Serious adverse events such as coma and respiratory depression are improbable. If a patient was to receive a sub potent tablet, symptoms may not be controlled. To date, there have been no reports of adverse events related to this recall.
BACKGROUND: Diphenoxylate hydrochloride and atropine sulfate tablets are indicated as adjunctive therapy in the management of diarrhea in patients 13 years of age and older.
RECOMMENDATION: Distributors or retailers with an existing inventory of the lots, which are being recalled, should stop use and distribution and quarantine immediately. If you have further distributed the recalled product, to the wholesale or retail level, please notify any accounts or additional locations which may have received the recalled product from you. For retailers that have dispensed product to consumer customers, please notify these customers regarding the recall. For additional assistance, call Stericycle at 1-855-215-4982 between the hours of 8 a.m. to 5 p.m. ET, Monday through Friday.
Consumers should contact their healthcare provider if they have experienced any problems that may be related to taking or using this drug product.
Healthcare professionals and patients are encouraged to report adverse events or side effects related to the use of these products to the FDA's MedWatch Safety Information and Adverse Event Reporting Program:
- Complete and submit the report Online: www.fda.gov/MedWatch/report
- Download form or call 1-800-332-1088 to request a reporting form, then complete and return to the address on the pre-addressed form, or submit by fax to 1-800-FDA-0178
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