View DIFICID savings options available to you including Manufacturer Coupons, Rx Advantage Savings Card, Canadian Prescription Savings or DIFICID Patient Assistance Program.

Programs are suitable for individuals who want to buy DIFICID without insurance, with insurance or for those who are underinsured. You can pay as little as $0 per fill.*

Manufactured by Merck & Co., Inc.

*Applicable to Drug Coupons & Patient Assistance Programs

This content is intended for US audiences only

Drug savings programs

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    Rx Advantage Card

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    Save up to 90%

  • Available

    Canadian Prescription Savings

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  • Unavailable

    Drug Coupons

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    Patient Assistance Programs

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Jamie Winn NowPatientGreen tick
Updated on 26 Apr 2024

Learn more about DIFICID

What is DIFICID?

What is DIFICID?

DIFICID is the brand name for fidaxomicin and is available as an oral tablet and suspension.

What dosages is DIFICID available in?

What dosages is DIFICID available in?

DIFICID is available as a 200 mg oral tablet and a 40 mg/ml oral suspension.

What is DIFICID used for?

What is DIFICID used for?

DIFICID is a macrolide antibiotic and is used to treat clostridioides difficile-associated diarrhea (commonly called “C. diff”).

How does DIFICID work?

How does DIFICID work?

DIFICID belongs to a group of antibiotics called macrolide antibiotics. It treats your infection by targeting C. difficile bacteria and stopping them from producing important nutrients they need to survive.

How do I take DIFICID?

How do I take DIFICID?

DIFICID is typically dosed as follows:

  • Adults: Take 200 mg (1 tablet) by mouth two times a day for 10 days.
  • Children over 6 months old (dose based on weight):
  • Children weighing more than 12.5 kg (27.5 lbs): Give 200 mg (5 mL) by mouth two times a day for 10 days.
  • Children weighing between 9 kg and 12.5 kg (20-27.5 lbs): Give 160 mg (4 mL) by mouth two times a day for 10 days
  • Children weighing between 7 kg and 9 kg (15-20 lbs): Give 120 mg (3 mL) by mouth two times a day for 10 days
  • Children weighing between 4 kg and 7 kg (9-15 lbs): Give 80 mg (2 mL) by mouth two times a day for 10 days
Is it safe for me to take DIFICID?

Is it safe for me to take DIFICID?

DIFICID is a safe and effective treatment when used for FDA licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you. DIFICID is contraindicated in patients who have known hypersensitivity to
fidaxomicin or any other ingredient in DIFICID.

DIFICID Common Side Effects

DIFICID Common Side Effects

Common side effects of DIFICID:

  • Fever
  • Nausea
  • Vomiting
  • Stomach pain
  • Rash
  • Constipation
DIFICID Serious Side Effects

DIFICID Serious Side Effects

Serious side effects are rare with DIFICID. Contact your healthcare provider immediately if you experience any of the following.

  • Allergic reactions
Effects of other drugs, drug classes and over-the-counter products on DIFICID

Effects of other drugs, drug classes and over-the-counter products on DIFICID

There are no major drug interactions listed for DIFICID. However, always let your physician and pharmacist know about any other medications or supplements (including prescribed and over-the-counter medications, vitamins, and dietary or herbal supplements) that you are currently taking.

Who makes DIFICID?

Who makes DIFICID?

Merck & Co., Inc.

Is DIFICID safe in pregnancy?

Is DIFICID safe in pregnancy?

It is not known if DIFICID can harm your unborn baby. DIFICID should only be used during pregnancy if the benefit to you is worth the possible risk to your baby.


What to do if you missed your DIFICID dose

The FDA's medical product safety reporting program for health professionals, patients and consumers.

Learn more about reporting side effects
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Medical Disclaimer

NowPatient has taken all reasonable steps to ensure that all material is factually accurate, complete, and current. However, the knowledge and experience of a qualified healthcare professional should always be sought after instead of using the information on this page. Before taking any drug, you should always speak to your doctor or another qualified healthcare provider.

The information provided here about medications is subject to change and is not meant to include all uses, precautions, warnings, directions, drug interactions, allergic reactions, or negative effects. The absence of warnings or other information for a particular medication does not imply that the medication or medication combination is appropriate for all patients or for all possible purposes.

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