Dificid

Indicated For

Clostridium difficile infection (CDI)

About This Medication

# Merck Patient Assistance Program Patient Guide: How to Get Dificid (fidaxomicin) at Low or No Cost Dificid (fidaxomicin) is an antibiotic used to treat *Clostridium difficile*-associated diarrhea (CDAD), a serious infection often caused by antibiotic use that leads to inflammation of the colon. The **Merck Patient Assistance Program (Merck PAP)** offers this medication at no cost to eligible uninsured or underinsured patients in the US who meet income and other criteria.[1][2][3] ## About Dificid (fidaxomicin) **Dificid** is a narrow-spectrum antibiotic specifically designed to target *C. difficile* bacteria in the gut without broadly disrupting the normal intestinal flora, which helps reduce the risk of recurrent infections. Unlike broader antibiotics like vancomycin, fidaxomicin stays mostly in the intestines and is minimally absorbed into the bloodstream, potentially leading to fewer side effects.[1] It's typically prescribed for adults with non-severe to severe CDAD and is taken orally as 200 mg tablets twice daily for 10 days. Common side effects include nausea, vomiting, abdominal pain, and gastrointestinal bleeding. Always follow your doctor's instructions, as this guide is not medical advice—consult your healthcare provider for personalized guidance.[3] CDAD can be life-threatening, especially in older adults or those with weakened immune systems. If you suspect CDAD (symptoms: watery diarrhea, fever, stomach cramps, loss of appetite), seek medical help immediately. Merck PAP helps ensure access to Dificid for those facing financial barriers.[2] ## Who Qualifies for Merck PAP? To qualify, you must meet **all** these criteria: - Reside in the US or US territory (no citizenship required).[1][3] - Have a valid prescription for Dificid from a US-licensed healthcare provider.[1] - Be primarily uninsured or without coverage for Dificid; no insurance, government programs, or employer plans that cover it (exceptions for financial/medical hardship).[1][4] - Meet income eligibility (see table below).[3] The program prioritizes those with financial hardship. Both you and your doctor must certify eligibility on the application.[1] ## Income Eligibility Breakdown Merck PAP bases eligibility on household income, typically up to **400% of the Federal Poverty Level (FPL)**, with exceptions for financial or medical hardship. Exact thresholds aren't publicly listed per household size here, but you can authorize electronic verification or provide proof. Use the program's checklist at merckhelps.com.[3][5] | Household Size | Annual Income Limit (approx. 400% FPL, 2026 est.) | Notes | |---------------|---------------------------------------------------|-------| | 1 (Individual) | $60,320 | Exceptions possible[3] | | 2 (Couple) | $81,760 | Based on FPL; verify electronically[5] | | 3 | $103,280 | Hardship cases reviewed[1] | | 4 | $124,800 | Add ~$21,520 per additional member[3] | *Notes: Income includes all household sources. Program may request verification (e.g., tax return, pay stubs) without affecting credit. Call 800-727-5400 for exact current FPL.[3][5] Always check merckhelps.com for updates, as FPL adjusts yearly.* ## Insurance Requirements **Primarily for uninsured patients** with no coverage for Dificid. This includes no private insurance, Medicare, Medicaid, VA, or employer plans covering the drug.[1][4] If you have insurance but face high copays due to hardship, exceptions may apply if income qualifies—discuss with the program.[1] Medicare patients: Generally ineligible unless no Part D coverage for Dificid and hardship approved.[4] Do not apply if insurance requires PAP participation.[1] ## Step-by-Step Application Process 1. **Check Eligibility**: Visit merckhelps.com or call **(800) 727-5400** (Mon-Fri, 8 AM-8 PM ET) to confirm.[2][3] 2. **Download Form**: Get the enrollment form from merckhelps.com. Fill Section 1 (patient info).[1][2] 3. **Gather Documents**: Prescription, proof of residency (e.g., utility bill), proof of income (e.g., pay stubs, tax return), completed application.[3] 4. **Doctor Completes**: Your healthcare provider (HCP) fills Sections 4-5, includes NPI, signs/dates.[1][3] 5. **Sign & Submit**: Both sign/date all sections. Mail original to Merck PAP (address on form); copies not accepted. Multiple methods possible (mail/fax per instructions).[1][5] 6. **Authorize Verification**: Allow electronic income check or attach one proof document.[3][5] *Tip: Use black ink; complete fully to avoid delays. Controlled substances need separate Rx.[3]* ## Timeline and Delivery Processing takes **about 2 weeks** (or less than 7 business days if complete); urgent needs call 800-727-5400.[3][5] Once approved, Dificid ships free to your home or doctor's office.[1] Enrollment valid up to **12 months**; reauthorization required annually or as needed.[6] ## Alternatives if Denied - **State Programs**: Check rxhope.com or state pharmaceutical assistance. - **Other PAPs**: Partnership for Prescription Assistance (pparx.org). - **Generic Options**: Vancomycin may be alternative; discuss with doctor. - **Patient Access Networks**: NeedyMeds.org for copay help. - **Appeal**: Call program for reasons; resubmit with more docs.[5] - **Generic fidaxomicin** if available (none currently).[1] No biosimilars for Dificid.[1] ## Disclaimer This guide is for informational purposes based on available program details as of 2026. Eligibility, terms, and availability can change—verify at merckhelps.com or 800-727-5400. Merck PAP not guaranteed; not a substitute for medical/financial advice. Consult your doctor/pharmacist. Merck reserves audit rights.[1][3] Word count: 1028.

Program information last verified: March 30, 2026