Synercid

Generic name: dalfopristin and quinupristin
Drug class: Streptogramins

Medically reviewed by  A Ras MD.

What is Synercid used for?

Synercid is a prescription medicine that is used to treat bacterial infections.

Description

Synercid® (quinupristin and dalfopristin powder for injection) I.V., a streptogramin antibacterial agent for intravenous administration, is a sterile lyophilized formulation of two semisynthetic pristinamycin derivatives, quinupristin (derived from pristinamycin I) and dalfopristin (derived from pristinamycin IIA) in the ratio of 30:70 (w/w).

Quinupristin is a white to very slightly yellow, hygroscopic powder. It is a combination of three peptide macrolactones. The main component of quinupristin (> 88.0%) has the following chemical name: N-[(6R,9S,10R,13S,15aS,18R,22S,24aS )-22-[p-(dimethylamino)benzyl]-6-ethyldocosahydro-10,23-dimethyl-5,8,12,15,17,21,24-heptaoxo-13-phenyl-18-[[(3S )-3-quinuclidinylthio] methyl]-12H-pyrido[2,1-f ]pyrrolo-[2,1-l ][1,4,7,10,13,16] oxapentaazacyclononadecin-9-yl]-3-hydroxypicolinamide.

The main component of quinupristin has an empirical formula of C53H67N9O10S, a molecular weight of 1022.24 and the following structural formula:

Chemical Structure

Dalfopristin is a slightly yellow to yellow, hygroscopic, powder. The chemical name for dalfopristin is: (3R,4R,5E,10E,12E,14S,26R,26a)-26-[[2-(diethylamino)ethyl]sulfonyl]-8,9,14,15,24,25,26,26a-octahydro-14-hydroxy-3-isopropyl-4,12-dimethyl-3H-21,18-nitrilo-1H,22H-pyrrolo[2,1-c ][1,8,4,19]-dioxadiazacyclotetracosine-1,7,16,22(4H,17)-tetrone.

Dalfopristin has an empirical formula of C34H50N4O9S, a molecular weight of 690.85 and the following structural formula:

Chemical Structure

Before taking Synercid, tell your doctor:

  • If you are allergic to Synercid; any part of this medicine; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.

This medicine may interact with other drugs or health problems.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Synercid with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take Synercid?

  • Tell all of your health care providers that you take Synercid. This includes your doctors, nurses, pharmacists, and dentists.
  • Do not use longer than you have been told. A second infection may happen.
  • Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Synercid while you are pregnant.
  • Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

How is Synercid best taken?

Use Synercid as ordered by your doctor. Read all information given to you. Follow all instructions closely.

  • It is given as an infusion into a vein over a period of time.

What do I do if I miss a dose?

  • Call your doctor to find out what to do.

What are the side effects of Synercid that I need to call my doctor about immediately?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

  • Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
  • Muscle or joint pain.
  • Yellow skin or eyes.
  • Pain and irritation where Synercid goes into the body.
  • Diarrhea is common with antibiotics. Rarely, a severe form called C diff–associated diarrhea (CDAD) may happen. Sometimes, this has led to a deadly bowel problem (colitis). CDAD may happen during or a few months after taking antibiotics. Call your doctor right away if you have stomach pain, cramps, or very loose, watery, or bloody stools. Check with your doctor before treating diarrhea.

What are some other side effects of Synercid?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

  • Diarrhea.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.

If overdose is suspected:

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

How do I store and/or throw out Synercid?

  • If you need to store Synercid at home, talk with your doctor, nurse, or pharmacist about how to store it.

 

Label

PRINCIPAL DISPLAY PANEL – 500 MG VIAL LABEL

  • NDC 61570-260-01
  • Synercid® I.V.
  • (quinupristin 150mg and dalfopristin 350mg)
    for Injection
  • 500 mg
  • Single Dose Vial, For I.V. Use Only-Not For Direct Infusion
    1 Sterile Vial
  • Pfizer
    Injectables
  • Rx only
PRINCIPAL DISPLAY PANEL - 500 mg Vial Label

PRINCIPAL DISPLAY PANEL – 10 VIAL CARTON

  • NDC 61570-260-10
    Contains 10 of NDC 61570-260-01
  • REFRIGERATE
  • Synercid® I.V.
  • (quinupristin 150mg and
    dalfopristin 350mg) for Injection
  • 500 mg
  • For I.V. Use Only. Prior to Reconstitution:
    Store in a refrigerator 2–8° C (36–46° F).
    10 Single Dose Vials
  • Pfizer
    Injectables
  • Rx only
PRINCIPAL DISPLAY PANEL - 10 Vial Carton

SRC: NLM .

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