Provider Briefing: Macrodantin Supply in 2026

Nitrofurantoin remains a first-line agent for uncomplicated urinary tract infections per IDSA guidelines, but supply disruptions continue to affect patient access. This briefing covers the current availability landscape, prescribing implications, and tools to help your patients locate their medication.

If your patients are reporting difficulty filling Nitrofurantoin prescriptions, they're not alone — and there are concrete steps both you and your patients can take to navigate the situation.

Shortage Timeline and Current Status

The Nitrofurantoin supply picture is nuanced and depends on formulation:

Oral Suspension (Furadantin, generics)

Nitrofurantoin oral suspension has been listed on the ASHP drug shortage database for several years, beginning around 2020. Key details:

• Teva Pharmaceuticals has listed its Nitrofurantoin oral suspension (25 mg/5 mL) as temporarily unavailable with no estimated release date
• Somerset Therapeutics has maintained some supply
• The shortage disproportionately affects pediatric patients and adults who cannot swallow capsules
• Some compounding pharmacies have filled the gap by preparing suspensions from capsule contents

Capsule Formulations (Macrodantin, Macrobid, generics)

Capsule formulations are not formally listed as in shortage by the FDA or ASHP. However:

• Intermittent stockouts are reported at individual pharmacies nationwide
• Demand has increased as patients displaced from the oral suspension shortage shift to capsules
• Macrobid (Nitrofurantoin monohydrate/macrocrystals) tends to be more readily available than Macrodantin (Nitrofurantoin macrocrystals)
• Generic Nitrofurantoin macrocrystals availability is better than brand-name Macrodantin in most markets

Prescribing Implications

Given the supply landscape, consider the following when prescribing Nitrofurantoin:

Formulation Selection

• Macrobid (100 mg BID × 5 days) is generally more available and better tolerated than Macrodantin (50-100 mg QID × 7 days). The BID dosing also improves adherence.
• For patients who need the QID formulation specifically, prescribe generic Nitrofurantoin macrocrystals rather than brand-name Macrodantin to maximize pharmacy flexibility
• For pediatric patients or those who can't swallow capsules, check with compounding pharmacies if the oral suspension is unavailable

When to Consider Alternatives

If Nitrofurantoin is unavailable in any form, evidence-based alternatives for uncomplicated UTI include:

• Trimethoprim/Sulfamethoxazole (Bactrim DS, 1 tab BID × 3 days) — first-line if local E. coli resistance is <20%
• Fosfomycin (Monurol, 3 g single dose) — useful when adherence is a concern
• Cephalexin (500 mg BID × 5-7 days) — second-line per IDSA guidelines
• Trimethoprim alone (100 mg BID × 3 days) — less commonly prescribed in the U.S. but effective

Avoid empiric fluoroquinolones for uncomplicated cystitis given resistance concerns and FDA safety warnings.

Resistance Considerations

Nitrofurantoin maintains exceptionally low resistance rates — only 3-4% of E. coli isolates show resistance, compared to >20% for TMP-SMX and fluoroquinolones. This makes the supply situation particularly frustrating from a stewardship perspective. Switching patients to broader-spectrum agents when Nitrofurantoin is unavailable carries antibiotic resistance implications worth noting.

Availability and Access

Help your patients navigate availability with these practical strategies:

• Medfinder for Providers allows clinicians to check real-time pharmacy availability before sending prescriptions, reducing the number of calls back from patients with unfilled scripts
• Recommend patients check independent pharmacies, which often have different supply chains than major chains
• Consider e-prescribing to multiple pharmacies (where regulations allow) or sending prescriptions to pharmacies the patient has confirmed have stock

Cost and Access Barriers

Even when Nitrofurantoin is available, cost can be a barrier for uninsured or underinsured patients:

• Brand-name Macrodantin: $44-$110+ per course
• Generic Nitrofurantoin (macrocrystals): $33-$58 retail; $9-$15 with GoodRx or SingleCare coupons
• Generic Nitrofurantoin mono/macro: $58 retail; $7-$11 with coupons
• Remind patients that free discount cards from GoodRx and SingleCare can significantly reduce out-of-pocket costs
• For patients with financial hardship, NeedyMeds and RxAssist list patient assistance resources

Generic Nitrofurantoin is on most insurance formularies at Tier 1 or Tier 2. Brand-name Macrodantin may require Tier 3 copay or prior authorization.

Tools and Resources for Your Practice

• Medfinder Provider Portal — Check pharmacy availability and direct patients to pharmacies with stock
• ASHP Drug Shortage Resource Center — Current shortage listings and alternative therapy suggestions
• Almatica Pharma Patient Assistance — 1-844-889-8686 for brand-name Macrodantin assistance
• Share our patient-facing guides: How to find Macrodantin in stock and alternatives to Macrodantin

Looking Ahead

The Nitrofurantoin oral suspension shortage is unlikely to resolve quickly given the limited manufacturer base and lack of timeline from Teva. Capsule availability should remain generally stable but with continued intermittent local disruptions.

From a stewardship perspective, maintaining access to Nitrofurantoin is important. Its narrow spectrum, low resistance rates, and strong evidence base make it an irreplaceable tool in the UTI treatment arsenal. Encouraging patients to use availability tools like Medfinder can reduce prescription abandonment and keep patients on first-line therapy.

Final Thoughts

The Macrodantin supply situation requires pragmatic clinical decision-making. Default to Macrobid or generic Nitrofurantoin mono/macro when possible for better availability and adherence. When switching to alternatives is necessary, match the agent to local resistance patterns and patient factors. And equip your patients with tools like Medfinder to help them find their medication.

Access Medfinder for Providers: medfinder.com/providers — Help your patients find Macrodantin and other medications in stock.