Disulfiram 500 mg Tablet, 90-count
🆔 Identity & classification
Where does this data come from?
🏷️ RxNorm drug class
This medicine belongs to the Aldehyde Dehydrogenase Inhibitor class.
Where does this data come from?
🏭 Manufacturer & labeler
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🩺 Clinical
- Disulfiram doesn't reduce cravings the way some other medications do. Instead, it changes how your body handles alcohol — if you drink while taking it, you'll experience a really u...
- What exactly does disulfiram do, and why would my doctor prescribe it?
- That depends entirely on your recovery progress. Some people take disulfiram for months; others need it for a year or more. Your doctor will work with you to figure out when you've...
- Unfortunately, yes — even hidden alcohol can trigger the reaction. That includes cooking sauces, vinegar, certain cough medicines, mouthwash, and even some aftershave lotions or ba...
Patient education
Supplement & herbal interactions
Some supplements/herbs that may interact with Disulfiram — tap one for details:
Disulfiram may be associated with lower levels of 1 nutrient — worth a chat with your pharmacist, not a cause for alarm.
Where does this data come from?
Ask a licensed pharmacist directly — free, answered by our team.
💊 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 3SY5LH9PMK
Anhydrous lactose is a milk sugar with no water content. It acts as a filler and binder in tablets and capsules, adding bulk and helping ingredients stick together.
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UNII M28OL1HH48
Croscarmellose sodium is a plant-based substance derived from cellulose. It acts as a disintegrant, helping tablets and capsules break down quickly in the digestive system so the medicine can be absorbed.
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UNII 70097M6I30
Magnesium stearate is a salt made from magnesium and stearic acid, a fatty substance. It's used in tablets and capsules as a lubricant and glidant to help ingredients flow smoothly during manufacturing and prevent sticking.
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UNII OP1R32D61U
Microcrystalline cellulose is a purified form of cellulose, a natural fiber from plant sources. It acts as a binder and filler in tablets and capsules, helping hold ingredients together and give the medicine its shape and size.
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UNII LQA7B6G8JG
A synthetic polymer made by combining water-soluble compounds. It acts as a surfactant and solubilizer to help mix oil and water-based ingredients, improving the medicine's texture and how active ingredients dissolve.
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Silicon dioxide is a naturally occurring mineral used as a glidant and anti-caking agent. It helps powder ingredients flow smoothly and prevents clumping during manufacturing and storage.
6 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
Are inactive ingredients the same for every manufacturer?
Why might an inactive ingredient be missing?
Can inactive ingredients matter?
💲 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 | $13.314 | $1,198.29 / 90 tablets |
| Medicaid paysCMS SDUD · 12 mo | $10.30 | $926.96 / 90 tablets |
Where does this data come from?
🔁 Therapeutic equivalents
| Product | Labeler | Pack | NADAC/unit | TE | Status | Price vs. this |
|---|---|---|---|---|---|---|
| Disulfiram 500 mg 42794-0029-08 | Sigmapharm | 30 tablets | $13.314 | AB | Availability likely | — |
| Disulfiram 500 mgthis 62135-0432-90 | Chartwell | 90 tablets | $13.314 | AB | Availability likely | — |
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
💊 Medicaid utilization by pack size
📊 Medicare Part D spend CMS · PART D · 2026 (Q1)
🔬 Reported adverse events (FAERS)
Top reported reactions
Age at onset
Reporter sex
Serious outcomes
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📦 Packaging — all sizes for this product
| Package NDC | Description | Per unit | Per pack | Marketing start | Status |
|---|---|---|---|---|---|
| 62135-0432-30 | 30 TABLET in 1 BOTTLE (62135-432-30) | $13.31 / ea | $399.43 | 2021-11-18 | Active |
| 62135-0432-90 You're viewing this | 90 TABLET in 1 BOTTLE (62135-432-90) | $13.31 / ea | $1,198.29 | 2021-11-18 | Active |
You're viewing the largest of 2 pack sizes for this product.
This pack effectively ties for the lowest per-ea cost of the 2 priced pack sizes ($13.31 NADAC).
This pack accounts for about 14% of this product's recent Medicaid fills; most go to the 30 tablets pack. See all packs ↓
Pack size FAQ
What quantity is in NDC 62135-0432-90?
What is the difference between NDC 62135-0432-90 and NDC 62135-0432-30?
What NDC number is used to bill for this package of Disulfiram 500 mg Tablet?
Prices are the latest CMS NADAC pharmacy acquisition cost per NDC; per-pack figures are per-unit × pack quantity, shown only when the pack is denominated in the same measure NADAC prices.
📄 Full prescribing information FDA SPL
🎯 Indications and Usage ▾
INDICATIONS AND USAGE Disulfiram is an aid in the management of selected chronic alcohol patients who want to remain in a state of enforced sobriety so that supportive and psychotherapeutic treatment may be applied to best advantage. Disulfiram is not a cure for alcoholism. When used alone, without proper motivation and supportive therapy, it is unlikely that it will have any substantive effect on the drinking pattern of the chronic alcoholic.
⏱️ Dosage and Administration ▾
DOSAGE AND ADMINISTRATION Disulfiram should never be administered until the patient has abstained from alcohol for at least 12 hours. Initial Dosage Schedule In the first phase of treatment, a maximum of 500 mg daily is given in a single dose for one to two weeks. Although usually taken in the morning, disulfiram may be taken on retiring by patients who experience a sedative effect.
Alternatively, to minimize, or eliminate, the sedative effect, dosage may be adjusted downward. Maintenance Regimen The average maintenance dose is 250 mg daily (range, 125 to 500 mg), it should not exceed 500 mg daily. Note : Occasionally patients, while seemingly on adequate maintenance doses of disulfiram, report that they are able to drink alcoholic beverages with impunity and without any symptomatology.
All appearances to the contrary, such patients must be presumed to be disposing of their tablets in some manner without actually taking them. Until such patients have been observed reliably taking their daily disulfiram tablets (preferably crushed and well mixed with liquid), it cannot be concluded that disulfiram is ineffective. Duration of Therapy The daily, uninterrupted administration of disulfiram must be continued until the patient is fully recovered socially and a basis for permanent self-control is established.
Depending on the individual patient, maintenance therapy may be required for months or even years. Trial with Alcohol During early experience with disulfiram, it was thought advisable for each patient to have at least one supervised alcohol-drug reaction. More recently, the test reaction has been largely abandoned.
Furthermore, such a test reaction should never be administered to a patient over 50 years of age. A clear, detailed and convincing description of the reaction is felt to be sufficient in most cases. However, where a test reaction is deemed necessary, the suggested procedure is as follows: After the first one to two weeks’ therapy with 500 mg daily, a drink of 15 mL (1/2 oz) of 100 proof whiskey, or equivalent, is taken slowly.
This test dose of alcoholic beverage may be repeated once only, so that the total dose does not exceed 30 mL (1 oz) of whiskey. Once a reaction develops, no more alcohol should be consumed. Such tests should be carried out only when the patient is hospitalized, or comparable supervision and facilities, including oxygen, are available.
Management of Disulfiram-Alcohol Reaction In severe reactions, whether caused by an excessive test dose or by the patient’s unsupervised ingestion of alcohol, supportive measures to restore blood pressure and treat shock should be instituted. Other recommendations include: oxygen, carbogen (95% oxygen and 5% carbon dioxide), vitamin C intravenously in massive doses (1 g) and ephedrine sulfate. Antihistamines have also been used intravenously.
Potassium levels should be monitored, particularly in patients on digitalis, since hypokalemia has been reported.
⛔ Contraindications ▾
CONTRAINDICATIONS Patients who are receiving or have recently received metronidazole, paraldehyde, alcohol, or alcohol-containing preparations, e.g., cough syrups, tonics and the like, should not be given disulfiram. Disulfiram is contraindicated in the presence of severe myocardial disease or coronary occlusion, psychoses, and hypersensitivity to disulfiram or to other thiuram derivatives used in pesticides and rubber vulcanization.
⚠️ Warnings ▾
WARNINGS Disulfiram should never be administered to a patient when he is in a state of alcohol intoxication, or without his full knowledge. The physician should instruct relatives accordingly. The patient must be fully informed of the disulfiram-alcohol reaction.
He must be strongly cautioned against surreptitious drinking while taking the drug, and he must be fully aware of the possible consequences. He should be warned to avoid alcohol in disguised forms, i.e., in sauces, vinegars, cough mixtures, and even in aftershave lotions and back rubs. He should also be warned that reactions may occur with alcohol up to 14 days after ingesting disulfiram.
The Disulfiram-Alcohol Reaction Disulfiram plus alcohol, even small amounts, produce flushing, throbbing in head and neck, throbbing headache, respiratory difficulty, nausea, copious vomiting, sweating, thirst, chest pain, palpitation, dyspnea, hyperventilation, tachycardia, hypotension, syncope, marked uneasiness, weakness, vertigo, blurred vision, and confusion. In severe reactions there may be respiratory depression, cardiovascular collapse, arrhythmias, myocardial infarction, acute congestive heart failure, unconsciousness, convulsions, and death.
The intensity of the reaction varies with each individual, but is generally proportional to the amounts of disulfiram and alcohol ingested. Mild reactions may occur in the sensitive individual when the blood alcohol concentration is increased to as little as 5 to 10 mg per 100 mL. Symptoms are fully developed at 50 mg per 100 mL, and unconsciousness usually results when the blood alcohol level reaches 125 to 150 mg.
The duration of the reaction varies from 30 to 60 minutes, to several hours in the more severe cases, or as long as there is alcohol in the blood. Concomitant Conditions Because of the possibility of an accidental disulfiram-alcohol reaction, disulfiram should be used with extreme caution in patients with any of the following conditions: diabetes mellitus, hypothyroidism, epilepsy, cerebral damage, chronic and acute nephritis, hepatic cirrhosis or insufficiency.
🤒 Adverse Reactions ▾
ADVERSE REACTIONS (See CONTRAINDICATIONS , WARNINGS , and PRECAUTIONS .) OPTIC NEURITIS, PERIPHERAL NEURITIS, POLYNEURITIS, AND PERIPHERAL NEUROPATHY MAY OCCUR FOLLOWING ADMINISTRATION OF DISULFIRAM. Multiple cases of hepatitis, including both cholestatic and fulminant hepatitis, as well as hepatic failure resulting in transplantation or death, have been reported with administration of disulfiram. Occasional skin eruptions are, as a rule, readily controlled by concomitant administration of an antihistaminic drug.
In a small number of patients, a transient mild drowsiness, fatigability, impotence, headache, acneform eruptions, allergic dermatitis, or a metallic or garlic-like aftertaste may be experienced during the first two weeks of therapy. These complaints usually disappear spontaneously with the continuation of therapy, or with reduced dosage. Psychotic reactions have been noted, attributable in most cases to high dosage, combined toxicity (with metronidazole or isoniazid), or to the unmasking of underlying psychoses in patients stressed by the withdrawal of alcohol.
🔄 Drug Interactions ▾
Drug Interactions Disulfiram appears to decrease the rate at which certain drugs are metabolized and therefore may increase the blood levels and the possibility of clinical toxicity of drugs given concomitantly. DISULFIRAM SHOULD BE USED WITH CAUTION IN THOSE PATIENTS RECEIVING PHENYTOIN AND ITS CONGENERS, SINCE THE CONCOMITANT ADMINISTRATION OF THESE TWO DRUGS CAN LEAD TO PHENYTOIN INTOXICATION. PRIOR TO ADMINISTERING DISULFIRAM TO A PATIENT ON PHENYTOIN THERAPY, A BASELINE PHENYTOIN SERUM LEVEL SHOULD BE OBTAINED.
SUBSEQUENT TO INITIATION OF DISULFIRAM THERAPY, SERUM LEVELS OF PHENYTOIN SHOULD BE DETERMINED ON DIFFERENT DAYS FOR EVIDENCE OF AN INCREASE OR FOR A CONTINUING RISE IN LEVELS. INCREASED PHENYTOIN LEVELS SHOULD BE TREATED WITH APPROPRIATE DOSAGE ADJUSTMENT. It may be necessary to adjust the dosage of oral anticoagulants upon beginning or stopping disulfiram, since disulfiram may prolong prothrombin time.
Patients taking isoniazid when disulfiram is given should be observed for the appearance of unsteady gait or marked changes in mental status, the disulfiram should be discontinued if such signs appear. In rats, simultaneous ingestion of disulfiram and nitrite in the diet for 78 weeks has been reported to cause tumors, and it has been suggested that disulfiram may react with nitrites in the rat stomach to form a nitrosamine, which is tumorigenic. Disulfiram alone in the rat’s diet did not lead to such tumors.
The relevance of this finding to humans is not known at this time. Usage in Pregnancy The safe use of this drug in pregnancy has not been established. Therefore, disulfiram should be used during pregnancy only when, in the judgement of the physician, the probable benefits outweigh the possible risks.
Pediatric Use Safety and effectiveness in pediatric patients have not been established. Nursing Mothers It is not known whether this drug is excreted in human milk. Since many drugs are so excreted, disulfiram should not be given to nursing mothers.
Geriatric Use A determination has not been made whether controlled clinical studies of disulfiram included sufficient numbers of subjects aged 65 and over to define a difference in response from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal or cardiac function, and of concomitant disease or other drug therapy.
🆘 Overdosage ▾
OVERDOSAGE No specific information is available on the treatment of overdosage with disulfiram. It is recommended that the physician contact the local Poison Control Center.
🧬 Clinical Pharmacology ▾
CLINICAL PHARMACOLOGY Disulfiram produces a sensitivity to alcohol which results in a highly unpleasant reaction when the patient under treatment ingests even small amounts of alcohol. Disulfiram blocks the oxidation of alcohol at the acetaldehyde stage. During alcohol metabolism following disulfiram intake, the concentration of acetaldehyde occurring in the blood may be 5 to 10 times higher than that found during metabolism of the same amount of alcohol alone.
Accumulation of acetaldehyde in the blood produces a complex of highly unpleasant symptoms referred to hereinafter as the disulfiram-alcohol reaction. This reaction, which is proportional to the dosage of both disulfiram and alcohol, will persist as long as alcohol is being metabolized. Disulfiram does not appear to influence the rate of alcohol elimination from the body.
Disulfiram is absorbed slowly from the gastrointestinal tract and is eliminated slowly from the body. One (or even two) weeks after a patient has taken his last dose of disulfiram, ingestion of alcohol may produce unpleasant symptoms. Prolonged administration of disulfiram does not produce tolerance; the longer a patient remains on therapy, the more exquisitely sensitive he becomes to alcohol.
📦 How Supplied / Storage and Handling ▾
HOW SUPPLIED Disulfiram Tablets, USP are available as: 250 mg – Off-white, round, biconvex, unscored tablets, debossed “CE” over “31” on one side and plain on the other side. The tablets are supplied in bottles of 30 (NDC# 62135-431-30) and 90 (NDC# 62135-431-90). 500 mg – Off-white, round, biconvex, scored tablets, debossed with “CE” above the score and “32” below the score on one side and plain on the other side.
The tablets are supplied in bottles of 30 (NDC# 62135-432-30) and 90 (NDC# 62135-432-90). Dispense in a tight, light-resistant container as defined in the USP. Store at 20° to 25°C (68° to 77°F) [see USP Controlled Room Temperature].
Manufactured for: Chartwell RX, LLC Congers, NY 10920 L70416 Rev 11/2021
📋 Description ▾
DESCRIPTION Disulfiram is an alcohol antagonist drug. CHEMICAL NAME: bis(diethylthiocarbamoyl) disulfide. STRUCTURAL FORMULA: C 10 H 20 N 2 S 4 M.W.
296.54 Disulfiram occurs as a white to off-white, odorless, and almost tasteless powder, soluble in water to the extent of about 20 mg in 100 mL, and in alcohol to the extent of about 3.8 g in 100 mL. Each tablet for oral administration contains 250 mg or 500 mg disulfiram, USP. Tablets also contain anhydrous lactose, colloidal silicon dioxide, croscarmellose sodium, magnesium stearate, microcrystalline cellulose, and poloxamer. image description