Monobenzone Compounded


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Monobenzone is an anti-inflammatory agent and a 5-aminosalicylic acid derivative. Here at CareFirst Specialty Pharmacy, we have the ability to compound monobenzone in a variety of strengths for patient-specific requirements.


(mono BEN zone)

Drug Class:

5-Aminosalicylic Acid Derivative and Anti-Inflammatory Agent

Mechanism of Action:

Monobenzone is a prodrug and is converted by bacterial azoreduction to 5-aminosalicylic acid (mesalamine, active), 4-aminobenzoyl--alanine (inert), and their metabolites. It may decrease inflammation by blocking production of arachidonic acid metabolites topically in the colon mucosa.

Drug Interactions:

Consider therapy modification with the following medications: Varicella Virus-Containing Vaccines

Adverse Effects:

Common side effects you might experience: headache, stomach pain or diarrhea, upset stomach or throwing up, nose or throat irritation, signs of a common cold, join pain, feeling tired or weak.

Tell your doctor if you begin to have any of these symptoms following metformin administration:

  • Signs of an allergic reaction like a rash, hives, itching, trouble breathing, wheezing, tightness in chest and/or throat.
  • Signs of kidney problems like unable to pass urine, change in how much urine is passed, blood in urine, or big weight gain.
  • Liver problems such as dark urine, feeling tired, not hungry, upset stomach, or stomach pain, light-colored stools, yellow skin or eyes.


Use this drug as ordered by your prescriber.


Contact your healthcare provider for specific dosing instructions.


Monobenzone’s active metabolite does cross the placenta. It is best to speak to your healthcare provider to see if benefits outweigh risks of using monobenzone while pregnant.


Monobenzone’s active metabolite is present in breast milk. The decision to breastfeed while taking metformin should consider the following: risk of infant exposure, the benefits of breastfeeding to the infant, and benefits of treatment to the mother. Based on limited information, monobenzone is considered relatively compatible with breastfeeding.


For children ≥5 years of age, monobenzone is relatively safe to use; however, dosing is subject to change based on age and weight.


  • Balsalazide [Lexi-Drugs]. Lexi-Comp. Wolters Kluwer Health, Inc. Updated September 9 th , 2020. Accessed September 25, 2020.
  • Colazal (balsalazide disodium) capsules [prescribing information]. Bridgewater, NJ: Salix Pharmaceuticals; June 2020.
  • National Center for Biotechnology Information. PubChem Compound Summary for CID 7638, Monobenzone. Accessed Sept. 25, 2020.



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