Ampicillin + Sulbactam
Indications
Gynaecological infections; Intra-abdominal infections; Skin and skin structure infections, Orbital Cellulitis, Pelvic Inflammatory Disease, Pneumonia, Urinary Tract Infections
Adult Dose
Parenteral
Gynaecological infections; Intra-abdominal infections; Skin and skin structure infections
Adult: Each vial contains 1.5 g (ampicillin 1 g and sulbactam 0.5 g) or 3 g (ampicillin 2 g and sulbactam 1 g): 1.5-3 g 6 hrly by deep IM or slow IV inj over 10-15 min or infusion over 15-30 min.
Max: 12 g (8 g ampicillin and 4 g sulbactam) daily.
Orbital Cellulitis
3 g (2 g ampicillin + 1 g sulbactam) IV q6hr
Pelvic Inflammatory Disease
3 g (2 g ampicillin + 1 g sulbactam) IV q6hr
Pneumonia
Aspiration or community acquired: 1.5 g (1 g ampicillin + 0.5 g sulbactam) to 3 g (2 g ampicillin + 1 g sulbactam) IV q6hr for 5 or more days
Hospital acquired: 3 g IV q6hr for 5 or more days
Urinary Tract Infections
Pyelonephritis: 3 g (2 g ampicillin + 1 g sulbactam) IV q6hr for 14 days
Child Dose
Parenteral
Child:
Skin Infections
>1 year (<40 kg): 200 mg/kg/day IV divided q6hr; not to exceed 14 days of therapy
>1 year (>40 kg): 1.5 g (1 g ampicillin + 0.5 g sulbactam) to 3 g (2 g ampicillin + 1 g sulbactam) q6hr; not to exceed 12 g/day
Epiglottitis
Children and adolescents: 100-200 mg ampicillin/kg/day IV divided q6hr
Mild/Moderate Infection
>1 month-1 year: 100-150 mg ampicillin/kg/day IV/IM divided q6hr
>1 year: 100-200 mg ampicillin/kg/day IV/IM divided q6hr
Meningitis/Severe Infections
>1 month-1 year: 200-300 mg ampicillin/kg/day IV/IM divided q6hr
>1 year: 200-400 mg ampicillin/kg/day IV/IM divided q6hr
Peritonsillar and Retropharyngeal Abscess
Children and adolescents: 200 mg ampicillin/kg/day IV divided q6hr
Renal Dose
Renal impairment
CrCl 5-14 mL/min/1.73 m²: 1.5 g (1 g ampicillin + 0.5 g sulbactam) to 3 g (2 g ampicillin + 1 g sulbactam) IV q24hr
CrCl 15-29 mL/min/1.73 m²: 3 g (2 g ampicillin + 1 g sulbactam) IV q12hr
CrCl > 30 mL/min/1.73 m²: No dose adjustment necessary
Administration
IV/IM Preparation
Reconstitute with SWI or 0.5% or 2% lidocaine injection (IM) to obtain a 250 mg ampicillin-125 mg sulbactam/mL solution
IM: Use within 1 hr after preparation
IV: Further dilute to 3-45 mg/mL with appropriate diluent
IV/IM Administration
Administer around-the-clock to promote less variation in peak and trough serum levels
Slow IV injection over at least 10-15 min or infusion over 15-30 min
IM: Deep into large muscle mass
Contra Indications
Hypersensitivity to drug or components
Patients with previous history of cholestatic jaundice/hepatic dysfunction associated with ampicillin sulbactam
Precautions
Use caution in patients with allergy to cephalosporins and carbapenems
Adjust dose in renal failure
Prolonged use is associated with fungal or bacterial superinfection
Hepatic dysfunction, including hepatitis and cholestatic jaundice reported; hepatic toxicity is usually reversible; however, deaths have occurred; monitor hepatic function at regular intervals in patients with hepatic impairment
A generalized dull red maculopapular rash may occur in 5-10% of children 3-14 days after initiating therapy; carefully evaluate the rash to differentiate a nonallergic ampicillin rash from a hypersensitivity reaction; it normally begins on the trunk and spreads over most of the body; it may be most intense at pressure areas, elbows, and knees
Hepatotoxicity reported; monitor hepatic function at regular intervals in patients with hepatic impairment
A high percentage of patients with infectious mononucleosis have developed rash during therapy; therapy is not recommended in these patients
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 skin rash monitor closely and discontinued therapy if lesions progress
Monitoring Parameters
Monitor haematologic, renal and hepatic function w/ prolonged therapy. Monitor for signs of anaphylaxis during 1st dose.
Regular monitoring of hepatic function in patients w/ pre-existing hepatic impairment at regular intervals.
Pregnancy-Lactation
B
Pregnancy category: B
Lactation: Excreted in breast milk; use caution
Interactions
Increased and prolonged serum levels w/ probenecid. Increased incidence of rashes w/ allopurinol. May reduce effectiveness of oestrogen-containing OC. May increase risk of methotrexate toxicity. Bacteriostatic drugs (e.g. chloramphenicol) may interfere w/ the bactericidal effect of ampicillin. Additive effect w/ anticoagulants.
Contraindicated (0)
Serious - Use Alternative (13)
BCG vaccine live
cholera vaccine
demeclocycline
doxycycline
eravacycline
microbiota oral
minocycline
mycophenolate
omadacycline
oxytetracycline
sarecycline
tetracycline
typhoid vaccine live
Adverse Effects
>10%
IM injection site pain (16%)
1-10%
Diarrhea (3%),IV injection site pain (3%),Thrombophlebitis (3%),Rash ( < 2%)
<1%
Abdominal distention,Black, "hairy" tongue,Candidiasis,Chest pain,Chills,Dysuria,Edema,Epistaxis,Erythema,Fatigue,Flatulence,Glossitis,Headache,Itching,Malaise,Mucosal bleeding,Nausea
Pseudomembranous colitis,Seizure,Tightness in throat,Thrombocytopenia,Urine retention,Vomiting
Mechanism of Action
Ampicillin binds to 1 or more of the penicillin-binding proteins (PBPs), thus inhibiting the final transpeptidation step of peptidoglycan synthesis in bacterial cell walls. Sulbactam inhibits the activity of beta-lactamases and extends the spectrum of ampicillin to include beta-lactamase producing organisms.