nitrofurantoin macrocrystals 50 mg Capsule, 100-count
🆔 Identity & classification
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🏷️ RxNorm drug class
This medicine belongs to the Nitrofuran Antibacterial class.
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🏭 Manufacturer & labeler
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🩺 Clinical
- Nitrofurantoin is an antibiotic specifically for urinary tract infections — think bladder infections, not kidney infections. It works by concentrating in your urine where it kills...
- What exactly is nitrofurantoin used for?
- Yes, every time. Taking nitrofurantoin with food isn't just about avoiding an upset stomach — food actually helps your body absorb more of the medication, so it works better. Even...
- Do I really need to take it with food every single time?
Patient education
Supplement & herbal interactions
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💊 What it looks like
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🧪 Inactive Ingredients / Excipients
Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.
💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.
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UNII H3R47K3TBD
FD&C Blue No. 1 is a synthetic blue dye approved for use in foods and medicines. It serves as a colorant to give the medication its distinctive appearance and help with product identification.
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UNII PN2ZH5LOQY
A synthetic red dye approved by the FDA for use in foods, medicines, and cosmetics. It serves as a colorant to make tablets, capsules, and liquids visually distinctive for product identification.
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UNII XM0M87F357
A dark iron oxide compound that gives medicines their black or dark color. It's used as a colorant in tablets and capsules to help identify the product and make it visually distinctive.
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UNII 2G86QN327L
Gelatin is a protein derived from animal collagen, commonly used in medicines as a gelling agent and capsule material. It helps create soft or hard capsule shells that hold and release medication, and can also thicken liquid formulations.
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UNII EWQ57Q8I5X
Lactose monohydrate is a natural sugar derived from milk. It serves as a filler and binder in tablets and capsules, helping create the proper size, texture, and consistency of the medicine.
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UNII WZH3C48M4T
Potassium hydroxide is a strong alkaline chemical used in medicines to adjust and maintain the pH level of liquid formulations, helping keep the product stable and the active ingredients effective.
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UNII 46N107B71O
Shellac is a natural resin secreted by the lac beetle. It's used as a coating on tablets and capsules to control how quickly the medicine dissolves and to improve appearance and stability.
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UNII O8232NY3SJ
A plant-based carbohydrate derived from corn kernels. It acts as a filler to add bulk, a binder to hold ingredients together, and a disintegrant to help the tablet break apart in your stomach for absorption.
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UNII 7SEV7J4R1U
A powder made from a naturally occurring mineral. In medicines, talc works as a glidant and anti-caking agent, helping tablets and capsules flow smoothly during manufacturing and preventing clumping.
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UNII 15FIX9V2JP
Titanium dioxide is a bright white mineral powder commonly used as a colorant and opacifying agent. It makes pills and tablets white or lighter in color and helps make coatings non-transparent.
10 inactive ingredients listed in the exact product block matched to this NDC.
Where does this data come from?
ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.Inactive ingredient FAQ
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💲 Pricing
A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.
| Price system | Per ea | Per package |
|---|---|---|
| Retail pharmacies payNADAC · weekly | $0.159 | $15.87 / 100 capsules |
| Medicaid paysCMS SDUD · 12 mo | $0.4557 | $45.57 / 100 capsules |
| Medicare drug plans payPart D · Q2 2026 | $0.3581 | $35.81 / 100 capsules |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Nitrofurantoin macrocrystals 50 mg 43386-0641-01 | Lupin | 100 capsules | $0.153 | AB | Availability likely | save 4% |
| Nitrofurantoin Macrocrystals 50 mg 00115-1643-01 | Amneal | 100 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin macrocrystals 50 mg 00904-7026-61 | Major | 100 capsules | $0.159 | AB | Availability likely | — |
| Nitrofurantoin Macrocrystals 50 mg 50268-0623-15 | AvPAK | 50 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin (macrocrystals) 50 mg 59651-0753-01 | Aurobindo | 100 capsules | $0.159 | AB | Availability likely | — |
| Nitrofurantoin Macrocrystals 50 mg 60687-0839-01 | American | 100 capsules | $0.159 | AB | Availability likely | — |
| Nitrofurantoin 50 mg 62332-0390-31 | Alembic | 100 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin macrocrystals 50 mg 68001-0604-00 | BluePoint | 100 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin macrocrystals 50 mg 68382-0559-01 | Zydus | 100 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin macrocrystals 50 mg 70756-0411-11 | Lifestar | 100 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin macrocrystals 50 mgthis 72603-0183-01 | NorthStar | 100 capsules | $0.159 | AB | Availability likely | — |
| nitrofurantoin macrocrystals 50 mg 47781-0307-01 | Alvogen | 100 capsules | $0.310 | AB | Discontinued | +95% |
| Nitrofurantion 50 mg 68001-0385-00 | BluePoint | 100 capsules | $0.310 | — | FDA listed | +95% |
| Nitrofurantoin 50 mg 46708-0390-31 | Alembic | 100 capsules | — | AB | FDA listed | — |
| Macrodantin 50 mg 52427-0287-01 | Almatica | 100 capsules | — | AB | Discontinued | — |
| Nitrofurantion 50 mg 57664-0232-18 | Sun | 1000 capsules | — | — | FDA listed | — |
| nitrofurantoin macrocrystals 50 mg 70771-1170-00 | Zydus | 1000 capsules | — | AB | FDA listed | — |
| Nitrofurantion Macrocrystals 50 mg 71205-0023-10 | Proficient | 10 capsules | — | AB | FDA listed | — |
| nitrofurantoin macrocrystals 50 mg 71335-2254-01 | Bryant | 28 capsules | — | AB | FDA listed | — |
Where does this data come from?
⏳ Availability & generic status
This product is an FDA-approved generic. Other versions of the same drug are listed under Therapeutic equivalents, least expensive first.
Where does this data come from?
🗺️ Medicaid utilization & spend
📦 Packaging — all sizes for this product
| Package NDC | Description | Marketing start | Status |
|---|---|---|---|
| 72603-0183-01 You're viewing this | 100 CAPSULE in 1 BOTTLE (72603-183-01) | 2023-12-01 | Active |
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
INDICATIONS AND USAGE Nitrofurantoin capsules (macrocrystals) are specifically indicated for the treatment of urinary tract infections when due to susceptible strains of Escherichia coli , enterococci, Staphylococcus aureus , and certain susceptible strains of Klebsiella and Enterobacter species. Nitrofurantoin is not indicated for the treatment of pyelonephritis or perinephric abscesses. To reduce the development of drug-resistant bacteria and maintain the effectiveness of nitrofurantoin capsules (macrocrystals) and other antibacterial drugs, nitrofurantoin capsules (macrocrystals) should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria.
When culture and susceptibility information are available, they should be considered in selecting or modifying antibacterial therapy. In the absence of such data, local epidemiology and susceptibility patterns may contribute to the empiric selection of therapy. Nitrofurantoins lack the broader tissue distribution of other therapeutic agents approved for urinary tract infections.
Consequently, many patients who are treated with nitrofurantoin capsules (macrocrystals) are predisposed to persistence or reappearance of bacteriuria. Urine specimens for culture and susceptibility testing should be obtained before and after completion of therapy. If persistence or reappearance of bacteriuria occurs after treatment with nitrofurantoin capsules (macrocrystals), other therapeutic agents with broader tissue distribution should be selected.
In considering the use of nitrofurantoin capsules (macrocrystals), lower eradication rates should be balanced against the increased potential for systemic toxicity and for the development of antimicrobial resistance when agents with broader tissue distribution are utilized.
⏱️ Dosage and Administration ▾
DOSAGE AND ADMINISTRATION Nitrofurantoin capsules, (macrocrystals) should be given with food to improve drug absorption and, in some patients, tolerance. Adults: 50 mg to 100 mg four times a day - the lower dosage level is recommended for uncomplicated urinary tract infections. Pediatric Patients: 5 mg/kg to 7 mg/kg of body weight per 24 hours, given in four divided doses (contraindicated under one month of age).
Therapy should be continued for one week or for at least 3 days after sterility of the urine is obtained. Continued infection indicates the need for reevaluation. For long-term suppressive therapy in adults, a reduction of dosage to 50 mg to 100 mg at bedtime may be adequate.
For long-term suppressive therapy in pediatric patients, doses as low as 1 mg/kg per 24 hours, given in a single dose or in two divided doses, may be adequate. SEE WARNINGS SECTION REGARDING RISKS ASSOCIATED WITH LONG-TERM THERAPY.
⛔ Contraindications ▾
CONTRAINDICATIONS Anuria, oliguria, or significant impairment of renal function (creatinine clearance under 60 mL per minute or clinically significant elevated serum creatinine) are contraindications. Treatment of this type of patient carries an increased risk of toxicity because of impaired excretion of the drug. Because of the possibility of hemolytic anemia due to immature erythrocyte enzyme systems (glutathione instability), the drug is contraindicated in pregnant patients at term (38 to 42 weeks' gestation), during labor and delivery, or when the onset of labor is imminent.
For the same reason, the drug is contraindicated in neonates under one month of age. Nitrofurantoin capsules (macrocrystals) are contraindicated in patients with a previous history of cholestatic jaundice/hepatic dysfunction associated with nitrofurantoin. Nitrofurantoin capsules (macrocrystals) are also contraindicated in those patients with known hypersensitivity to nitrofurantoin.
⚠️ Warnings ▾
WARNINGS Pulmonary reactions: ACUTE, SUBACUTE, OR CHRONIC PULMONARY REACTIONS HAVE BEEN OBSERVED IN PATIENTS TREATED WITH NITROFURANTOIN. IF THESE REACTIONS OCCUR, NITROFURANTOIN CAPSULES (MACROCRYSTALS) SHOULD BE DISCONTINUED AND APPROPRIATE MEASURES TAKEN. REPORTS HAVE CITED PULMONARY REACTIONS AS A CONTRIBUTING CAUSE OF DEATH.
CHRONIC PULMONARY REACTIONS (DIFFUSE INTERSTITIAL PNEUMONITIS OR PULMONARY FIBROSIS, OR BOTH) CAN DEVELOP INSIDIOUSLY. THESE REACTIONS OCCUR RARELY AND GENERALLY IN PATIENTS RECEIVING THERAPY FOR SIX MONTHS OR LONGER. CLOSE MONITORING OF THE PULMONARY CONDITION OF PATIENTS RECEIVING LONG-TERM THERAPY IS WARRANTED AND REQUIRES THAT THE BENEFITS OF THERAPY BE WEIGHED AGAINST POTENTIAL RISKS (SEE RESPIRATORY REACTIONS).
Hepatotoxicity: Hepatic reactions, including hepatitis, cholestatic jaundice, chronic active hepatitis, and hepatic necrosis, occur rarely. Fatalities have been reported. The onset of chronic active hepatitis may be insidious, and patients should be monitored periodically for changes in biochemical tests that would indicate liver injury.
If hepatitis occurs, the drug should be withdrawn immediately and appropriate measures should be taken. Neuropathy: Peripheral neuropathy, which may become severe or irreversible, has occurred. Fatalities have been reported.
Conditions such as renal impairment (creatinine clearance under 60 mL per minute or clinically significant elevated serum creatinine), anemia, diabetes mellitus, electrolyte imbalance, vitamin B deficiency, and debilitating disease may enhance the occurrence of peripheral neuropathy. Patients receiving long-term therapy should be monitored periodically for changes in renal function. Optic neuritis has been reported rarely in postmarketing experience with nitrofurantoin formulations.
Hemolytic anemia: Cases of hemolytic anemia of the primaquine-sensitivity type have been induced by nitrofurantoin. Hemolysis appears to be linked to a glucose-6-phosphate dehydrogenase deficiency in the red blood cells of the affected patients. This deficiency is found in 10 percent of Blacks and a small percentage of ethnic groups of Mediterranean and Near-Eastern origin.
Hemolysis is an indication for discontinuing nitrofurantoin capsules (macrocrystals); hemolysis ceases when the drug is withdrawn. Clostridium difficile -associated diarrhea: Clostridium difficile associated diarrhea (CDAD) has been reported with use of nearly all antibacterial agents, including nitrofurantoin, and may range in severity from mild diarrhea to fatal colitis. Treatment with antibacterial agents alters the normal flora of the colon leading to overgrowth of C. difficile .
C. difficile produces toxins A and B which contribute to the development of CDAD. Hypertoxin producing strains of C. difficile cause increased morbidity and mortality, as these infections can be refractory to antimicrobial therapy and may require colectomy. CDAD must be considered in all patients who present with diarrhea following antibiotic use.
Careful medical history is necessary since CDAD has been reported to occur over two months after the administration of antibacterial agents. If CDAD is suspected or confirmed, ongoing antibiotic use not directed against C. difficile may need to be discontinued. Appropriate fluid and electrolyte management, protein supplementation, antibiotic treatment of C. difficile , and surgical evaluation should be instituted as clinically indicated.
🤒 Adverse Reactions ▾
ADVERSE REACTIONS Respiratory: CHRONIC, SUBACUTE, OR ACUTE PULMONARY HYPERSENSITIVITY REACTIONS MAY OCCUR. CHRONIC PULMONARY REACTIONS OCCUR GENERALLY IN PATIENTS WHO HAVE RECEIVED CONTINUOUS TREATMENT FOR SIX MONTHS OR LONGER. MALAISE, DYSPNEA ON EXERTION, COUGH, AND ALTERED PULMONARY FUNCTION ARE COMMON MANIFESTATIONS WHICH CAN OCCUR INSIDIOUSLY.
RADIOLOGIC AND HISTOLOGIC FINDINGS OF DIFFUSE INTERSTITIAL PNEUMONITIS OR FIBROSIS, OR BOTH, ARE ALSO COMMON MANIFESTATIONS OF THE CHRONIC PULMONARY REACTION. FEVER IS RARELY PROMINENT. THE SEVERITY OF CHRONIC PULMONARY REACTIONS AND THEIR DEGREE OF RESOLUTION APPEAR TO BE RELATED TO THE DURATION OF THERAPY AFTER THE FIRST CLINICAL SIGNS APPEAR.
PULMONARY FUNCTION MAY BE IMPAIRED PERMANENTLY, EVEN AFTER CESSATION OF THERAPY. THE RISK IS GREATER WHEN CHRONIC PULMONARY REACTIONS ARE NOT RECOGNIZED EARLY. In subacute pulmonary reactions, fever and eosinophilia occur less often than in the acute form.
Upon cessation of therapy, recovery may require several months. If the symptoms are not recognized as being drug-related and nitrofurantoin therapy is not stopped, the symptoms may become more severe. Acute pulmonary reactions are commonly manifested by fever, chills, cough, chest pain, dyspnea, pulmonary infiltration with consolidation or pleural effusion on x-ray, and eosinophilia.
Acute reactions usually occur within the first week of treatment and are reversible with cessation of therapy. Resolution often is dramatic (see WARNINGS ). Changes in EKG (e.g., non-specific ST/T wave changes, bundle branch block) have been reported in association with pulmonary reactions.
Cyanosis has been reported rarely. Hepatic: Hepatic reactions, including hepatitis, cholestatic jaundice, chronic active hepatitis, and hepatic necrosis, occur rarely (see WARNINGS ). Neurologic: Peripheral neuropathy, which may become severe or irreversible, has occurred.
Fatalities have been reported. Conditions such as renal impairment (creatinine clearance under 60 mL per minute or clinically significant elevated serum creatinine), anemia, diabetes mellitus, electrolyte imbalance, vitamin B deficiency, and debilitating diseases may increase the possibility of peripheral neuropathy (see WARNINGS ). Asthenia, vertigo, nystagmus, dizziness, headache, and drowsiness also have been reported with the use of nitrofurantoin.
Benign intracranial hypertension (pseudotumor cerebri), confusion, depression, optic neuritis, and psychotic reactions have been reported rarely. Bulging fontanels, as a sign of benign intracranial hypertension in infants, have been reported rarely. Dermatologic: Exfoliative dermatitis and erythema multiforme (including Stevens-Johnson syndrome) have been reported rarely.
Transient alopecia also has been reported. Allergic: A lupus-like syndrome associated with pulmonary reactions to nitrofurantoin has been reported. Also, angioedema; maculopapular, erythematous, or eczematous eruptions; pruritus; urticaria; anaphylaxis; arthralgia; myalgia; drug fever; chills; and vasculitis (sometimes associated with pulmonary reactions) have been reported.
Hypersensitivity reactions represent the most frequent spontaneously-reported adverse events in worldwide postmarketing experience with nitrofurantoin formulations. Gastrointestinal: Nausea, emesis, and anorexia occur most often. Abdominal pain and diarrhea are less common gastrointestinal reactions.
These dose-related reactions can be minimized by reduction of dosage. Sialadenitis and pancreatitis have been reported. There have been sporadic reports of pseudomembranous colitis with the use of nitrofurantoin.
The onset of pseudomembranous colitis symptoms may occur during or after antimicrobial treatment (see WARNINGS ). Hematologic: Cyanosis secondary to methemoglobinemia has been reported rarely. Miscellaneous: As with other antimicrobial agents, superinfections caused by resistant organisms, e.g., Pseudomonas species or Candida species, can occur.
Laboratory Adverse…
🆘 Overdosage ▾
OVERDOSAGE Occasional incidents of acute overdosage of nitrofurantoin capsules (macrocrystals) have not resulted in any specific symptoms other than vomiting. Induction of emesis is recommended. There is no specific antidote, but a high fluid intake should be maintained to promote urinary excretion of the drug. It is dialyzable.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY Nitrofurantoin capsules (macrocrystals) is a larger crystal form of Furadantin ® (nitrofurantoin). The absorption of nitrofurantoin capsules (macrocrystals) is slower and its excretion somewhat less when compared to Furadantin ® . Blood concentrations at therapeutic dosage are usually low.
It is highly soluble in urine; to which it may impart a brown color. Following a dose regimen of 100 mg q.i.d. for 7 days, average urinary drug recoveries (0 to 24 hours) on day 1 and day 7 were 37.9% and 35.0%. Unlike many drugs, the presence of food or agents delaying gastric emptying can increase the bioavailability of nitrofurantoin capsules (macrocrystals), presumably by allowing better dissolution in gastric juices.
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Nitrofurantoin capsules, USP (macrocrystals) are available as follows: 25 mg white opaque cap and white opaque body, hard gelatin size "5" capsules imprinted with "LS" on cap and "410" on body with black ink, containing light yellow to yellow colored powder. NDC 72603-182-01 Bottle of 100 with child-resistant closure 50 mg blue opaque cap and white opaque body, hard gelatin size "3" capsules imprinted with "LS" on cap and "411" on body with black ink containing light yellow to yellow colored powder. NDC 72603-183-01 Bottle of 100 with child-resistant closure 100 mg blue opaque cap and blue opaque body, hard gelatin size "2" capsules imprinted with "LS" on cap and "412" on body with black ink containing light yellow to yellow colored powder.
NDC 72603-184-01 Bottle of 100 with child-resistant closure Store at 20° to 25°C (68° to 77°F). [See USP for Controlled Room Temperature.] Dispense in a tight, light-resistant container as defined in the USP using a child-resistant closure. Manufactured for: NorthstarRxLLC Memphis, TN 38141. Toll-Free: 1-800-206-7821 Manufactured by: Mankind Pharma Limited Paonta Sahib, Sirmaur Himachal Pradesh 173025, India.
Brands listed are the trademarks of their respective owners. Issued: August 2023, V-01
📋 Description ▾
DESCRIPTION Nitrofurantoin capsules, USP (macrocrystals) are a synthetic chemical of controlled crystal size. It is a stable, lemon yellow, crystalline compound. Nitrofurantoin capsules, USP (macrocrystals) are an antibacterial agent for specific urinary tract infections.
It is available in 25 mg, 50 mg, and 100 mg capsules for oral administration. Each capsule contains 25 mg, 50 mg, or 100 mg of nitrofurantoin, USP (macrocrystals). Molecular Formula: C 8 H 6 N 4 O 5 Molecular Weight: 238.16 g/mole 1-[[(5-nitro-2-furanyl)methylene] amino]-2,4-imidazolidinedione Inactive Ingredients: Each capsule contains: corn starch, gelatin, lactose monohydrate, talc and titanium dioxide.
Additionally, each 50 mg and 100 mg capsule shell contains FD&C Blue no. 1 and FD&C Red no. 3.
The capsule is printed with black pharmaceutical ink which contains ferrosoferric oxide, potassium hydroxide, and shellac. structure