Unasyn

Generic name: ampicillin and sulbactam

Used for: Skin infections · Infections inside the belly · Gynecological infections · 2 more

How do you pay?

How to pay the least

Ask for the cash price

Generic ampicillin and sulbactam

No pharmacy we check posts a price for it.

  1. Ask your pharmacy for the cash price of generic ampicillin and sulbactam.Find pharmacies near you 
  2. Ask one or two other pharmacies too. Cash prices for the same generic can differ a lot from store to store.

A regular generic has the same active ingredient as Unasyn, and the FDA requires it to work the same way.

Compare every option

Question
Brand nameUnasyn
Authorized genericampicillin and sulbactam
Regular genericampicillin and sulbactam
What you’d pay
Cash priceAsk the pharmacyUsually the highest price
Not soldThere isn’t one
Cash priceAsk the pharmacyUsually the lowest
Same as Unasyn?
The original
–
Same active ingredientFillers and dyes can differ

Brand nameNo maker’s card

We didn’t find a savings card or cash price from Unasyn’s maker. Ask the pharmacy for Unasyn’s cash price. With insurance, ask what your plan charges.

Authorized genericNot sold

There isn’t one. An authorized generic is Unasyn itself, from the same company, sold without the brand name, and usually for less. A regular generic is sold, with the same active ingredient: ask the pharmacy for its price.

See the regular generic →

Regular genericWho makes it

9 companies sell a generic of Unasyn that the FDA rates a substitute. A pharmacy fills whichever one it stocks. To get a certain maker, ask for it by name; most pharmacies can order it in a day or two.

It’s mostly filled by specialty pharmacies. Your prescriber’s office or insurer can tell you which one to use.

  • Armas Pharmaceuticals1 g / 0.5 g, 2 g / 1 g, 10 g/15 g / 5 g/15 g

    Made by Onesource Specialty Pharma

    Product page on armaspharmaceuticals.com

    Packages and NDCs

    1 g / 0.5 g Off-white

    PackageNDC
    Carton of 1072485-416-10

    2 g / 1 g Off-white

    PackageNDC
    Carton of 1072485-417-10

    10 g/15 g / 5 g/15 g White to off-white dry powder

    PackageNDC
    Carton of 15 g72485-418-15

    FDA label

  • Avenacy1 g / 0.5 g, 2 g / 1 g, 10 g / 5 g

    Made by Acs Dobfar Spa

    Product page on avenacy.com

    Packages and NDCs

    1 g / 0.5 g

    PackageNDC
    Carton of 1083634-109-20

    2 g / 1 g

    PackageNDC
    Carton of 1083634-110-20

    10 g / 5 g

    PackageNDC
    Carton of 183634-108-99

    FDA label

  • Civica2 g / 1 g

    Made by Onesource Specialty Pharma

    Packages and NDCs

    2 g / 1 g

    PackageNDC
    Carton of 1072572-136-10

    FDA label

  • EugiaAll 3 strengths

    Product page on eugiaus.com

    Packages and NDCs

    1 g / 0.5 g White to Off-white

    PackageNDC
    Carton of 1055150-116-10

    1 g / 0.5 g White to Off-white

    PackageNDC
    Carton of 1055150-116-20

    2 g / 1 g White to Off-white

    PackageNDC
    Carton of 1055150-117-20

    2 g / 1 g White to Off-white

    PackageNDC
    Carton of 1055150-117-10

    100 mg/mL / 50 mg/mL White to Off-white

    PackageNDC
    Carton of 100 mL55150-118-99

    100 mg/mL / 50 mg/mL White to Off-white

    PackageNDC
    Carton of 100 mL55150-118-01

    FDA label

  • Hikma Pharmaceuticals1 g/1.5 g / 0.5 g/1.5 g, 2 g/3 g / 1 g/3 g, 100 mg/mL / 50 mg/mL

    Made by Acs Dobfar Spa

    Packages and NDCs

    1 g/1.5 g / 0.5 g/1.5 g

    PackageNDC
    Carton of 15 g0641-6116-10

    2 g/3 g / 1 g/3 g

    PackageNDC
    Carton of 30 g0641-6117-10

    100 mg/mL / 50 mg/mL

    PackageNDC
    Vial of 100 mL0641-6118-01

    FDA label

  • Meitheal Pharmaceuticals1 g / 0.5 g, 2 g / 1 g, 10 g / 5 g

    Made by Acs Dobfar Spa

    Product page on meithealpharma.com

    Packages and NDCs

    1 g / 0.5 g

    PackageNDC
    Carton of 1071288-031-21

    1 g / 0.5 g

    PackageNDC
    Carton of 1071288-031-92

    2 g / 1 g

    PackageNDC
    Carton of 1071288-032-92

    2 g / 1 g

    PackageNDC
    Carton of 1071288-032-21

    10 g / 5 g

    PackageNDC
    Carton of 171288-033-75

    10 g / 5 g

    PackageNDC
    Carton of 171288-033-91

    FDA label

  • NorthStar Rx1 g / 0.5 g, 2 g / 1 g, 10 g / 5 g

    Made by Acs Dobfar Spa

    Product page on northstarrxllc.com

    Packages and NDCs

    1 g / 0.5 g

    PackageNDC
    Vial of 172603-220-01
    Carton of 1072603-220-10

    2 g / 1 g

    PackageNDC
    Vial of 172603-335-01
    Carton of 1072603-335-10

    10 g / 5 g

    PackageNDC
    Carton of 1072603-444-01

    FDA label

  • Sagent PharmaceuticalsAll 3 strengths

    Made by Acs Dobfar Spa and Antibiotice

    Packages and NDCs

    1 g / 0.5 g

    PackageNDC
    Carton of 1025021-142-20

    2 g / 1 g

    PackageNDC
    Carton of 1025021-143-30

    100 mg/mL / 50 mg/mL

    PackageNDC
    Carton of 100 mL25021-144-99

    FDA label

  • WG Critical Care1 g / 0.5 g, 2 g / 1 g, 10 g / 5 g

    Made by Antibiotice and HQ Specialty Pharma

    Product page on wgcriticalcare.com

    Packages and NDCs

    1 g / 0.5 g

    PackageNDC
    Carton of 1044567-210-10

    1 g / 2 g

    PackageNDC
    Carton of 1044567-150-10

    1 g / 2 g

    PackageNDC
    Carton of 1044567-211-10

    10 g / 5 g

    PackageNDC
    Carton of 144567-212-01

    FDA label

Who sells it: FDA and Medicaid records, updated weekly. Each maker’s page, card and program is from its own site.

What to say at the pharmacy

“Before you fill my Unasyn, can you tell me what I’d pay for the brand and for a generic?”

Paying cash? Ask for each one’s cash price. With insurance, ask what your plan charges for each.

What it’s used for

What the FDA label says

UNASYN is indicated for the treatment of infections due to susceptible strains of the designated microorganisms in the conditions listed below.

Skin and Skin Structure Infections caused by beta-lactamase producing strains of Staphylococcus aureus, Escherichia coli, Efficacy for this organism in this organ system was studied in fewer than 10 infections. Klebsiella spp. (including K. pneumoniae ), Proteus mirabilis, Bacteroides fragilis, Enterobacter spp., and Acinetobacter calcoaceticus.

NOTE: For information on use in pediatric patients (see PRECAUTIONS–Pediatric Use and CLINICAL STUDIES sections).

Intra-Abdominal Infections caused by beta-lactamase producing strains of Escherichia coli, Klebsiella spp. (including K. pneumoniae ), Bacteroides spp. (including B. fragilis), and Enterobacter spp.

Gynecological Infections caused by beta-lactamase producing strains of Escherichia coli, and Bacteroides spp. (including B. fragilis ).

While UNASYN is indicated only for the conditions listed above, infections caused by ampicillin-susceptible organisms are also amenable to treatment with UNASYN due to its ampicillin content. Therefore, mixed infections caused by ampicillin-susceptible organisms and beta-lactamase producing organisms susceptible to UNASYN should not require the addition of another antibacterial.

Appropriate culture and susceptibility tests should be performed before treatment in order to isolate and identify the organisms causing infection and to determine their susceptibility to UNASYN.

Therapy may be instituted prior to obtaining the results from bacteriological and susceptibility studies when there is reason to believe the infection may involve any of the beta-lactamase producing organisms listed above in the indicated organ systems. Once the results are known, therapy should be adjusted if appropriate.

To reduce the development of drug-resistant bacteria and maintain effectiveness of UNASYN and other antibacterial drugs, UNASYN should be used only to treat infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy.

Source: the FDA label for Unasyn (Roerig), July 10, 2026. Full label on DailyMed 

Good to know

Prices change: confirm with the pharmacy before you fill. drugalt.com/drug/unasyn/