While Ampicillin for Injection, USP, 1 g and 2 g, are primarily for intravenous use, they may be administered intramusculary when the 250 mg or 500 mg vials are unavailable. UNASYN, ampicillin sodium/sulbactam sodium parenteral combination, is available as a white to off-white dry powder for reconstitution. UNASYN dry powder is freely soluble in aqueous diluents to yield pale yellow to yellow solutions containing ampicillin sodium and sulbactam sodium equivalent to 250 mg ampicillin per mL and 125 mg sulbactam per mL. Ampicillin is a penicillin antibiotic that fights bacteria. Ampicillin is used to treat or prevent many different types of infections such as bladder infections, pneumonia, gonorrhea, meningitis, or infections of the stomach or intestines. Sofia is the epitome of class, style and higher living. A joie de vivre unlike any other, she doesn’t rush for anyone, she enjoys living la bella vita. Ampicillin precautions. Ampicillin is not recommended for patients with allergic reaction to the drug and its components or analogies: antibiotics, such as amoxicillin, carbenicillin, dicloxacillin, oxacillin, penicillin and others. Labor and Delivery Oral ampicillin-class antibiotics are poorly absorbed during labor. Studies in guinea pigs showed that intravenous administration of ampicillin slightly decreased the uterine tone and frequency of contractions, Medscape - Indication-specific dosing for Ampi, Omnipen (ampicillin), frequency-based adverse effects, comprehensive interactions, contraindications, pregnancy & lactation schedules, and cost information. Ampicillin/sulbactam is a combination of the common penicillin-derived antibiotic ampicillin and sulbactam, an inhibitor of bacterial beta-lactamase. Ampicillin official prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions, pharmacology and more. 50 mg/kg/dose IV every 6 hours is recommended by the Infectious Diseases Society of America (IDSA) in general; however, higher doses of 75 mg/kg/dose IV every 6 hours are recommended for group B streptococcal (GBS) meningitis.