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Drug Safety-related Labeling Changes (SrLC)

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UNASYN (NDA-050608)

(AMPICILLIN SODIUM; SULBACTAM SODIUM)

Safety-related Labeling Changes Approved by FDA Center for Drug Evaluation and Research (CDER)

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11/05/2025 (SUPPL-58)

Approved Drug Label (PDF)

6 Adverse Reactions

Additions and/or revisions underlined:

Metabolism and Nutrition Disorders: Hypokalemia

01/31/2025 (SUPPL-56)

Approved Drug Label (PDF)

5 Warnings and Precautions

WARNINGS

Severe Cutaneous Adverse Reactions

UNASYN may cause severe skin reactions, such as toxic epidermal necrolysis (TEN), Stevens- Johnson syndrome (SJS), drug reaction with eosinophilia and systemic symptoms (DRESS), dermatitis exfoliative, erythema multiforme, and Acute generalized exanthematous pustulosis (AGEP). If patients develop a skin rash they should be monitored closely and UNASYN discontinued if lesions progress (see CONTRAINDICATIONS and ADVERSE REACTIONS sections).

6 Adverse Reactions

Additions and or revisions underlined:

Musculoskeletal and Connective Tissue Disorders: Arthralgia

Skin and Subcutaneous Tissue Disorders: Toxic epidermal necrolysis, Stevens-Johnson syndrome, drug reaction with eosinophilia and systemic symptoms (DRESS), angioedema, Acute generalized exanthematous pustulosis (AGEP), erythema multiforme, exfoliative dermatitis, urticaria (see CONTRAINDICATIONS and WARNINGS sections), and linear IgA bullous dermatosis.

05/01/2024 (SUPPL-53)

Approved Drug Label (PDF)

6 Adverse Reactions

Additions and revisions underlined:

Skin and Subcutaneous Tissue Disorders: Toxic epidermal necrolysis, StevensJohnson syndrome, angioedema, Acute generalized exanthematous pustulosis (AGEP), erythema multiforme, exfoliative dermatitis, urticaria (see CONTRAINDICATIONS and WARNINGS sections), and linear IgA bullous dermatosis.

10/09/2020 (SUPPL-47)

Approved Drug Label (PDF)

6 Adverse Reactions

(Additions and/or revisions underlined)

Immune System Disorders: Serious and fatal hypersensitivity (anaphylactic) reactions (see WARNINGS section). Acute myocardial ischemia with or without myocardial infarction may occur as part of an allergic reaction.

04/19/2018 (SUPPL-46)

Approved Drug Label (PDF)

6 Adverse Reactions

Postmarketing Experience

(additions underlined)

 

Gastrointestinal Disorders: Abdominal pain, cholestatic hepatitis, cholestasis, hyperbilirubinemia, jaundice, abnormal hepatic function, melena, gastritis, stomatitis, dyspepsia, black “hairy” tongue, and Clostridium difficile associated diarrhea (see CONTRAINDICATIONS and WARNINGS sections).

Nervous System Disorders: Convulsion and dizziness

Respiratory, Thoracic and Mediastinal Disorders: Dyspnea

 

Skin and Subcutaneous Tissue Disorders: Toxic epidermal necrolysis, Stevens-Johnson syndrome, angioedema, Acute generalized exanthematous pustulosis (AGEP), erythema multiforme, exfoliative dermatitis, and urticaria (see CONTRAINDICATIONS and WARNINGS sections).

02/13/2017 (SUPPL-44)

Approved Drug Label (PDF)

5 Warnings and Precautions

(Newly added section)

Severe Cutaneous Adverse Reactions

UNASYN may cause severe skin reactions, such as toxic epidermal necrolysis (TEN), Stevens- Johnson syndrome (SJS), dermatitis exfoliative, erythema multiforme, and acute generalized exanthematous pustulosis (AGEP). If patients develop a skin rash they should be monitored closely and UNASYN discontinued if lesions progress.