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likmez

Likmez (Metronidazole) is a nitroimidazole antimicrobial used to treat Abscess, Amebiasis, Bacteroides Infections, Bacterial Endocarditis.

Metronidazole · by Saptalis Pharms

Available as a generic: Metronidazole

⚠ FDA reports a current shortage of the injection form — availability differs between suppliers — see drug shortages →
Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 30, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Active ingredient
Metronidazole
Form
Suspension
Strength
Metronidazole 500MG/5ML
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Saptalis Pharms
Half-life
about 8 hours (how long it stays in your system)
What the pharmacy pays
~$0.10 per gm — not your price
FDA application
NDA216755

What is Likmez?

From the FDA label:LIKMEZ (metronidazole) oral suspension is a nitroimidazole antimicrobial. The chemical name of metronidazole is 2-methyl-5-nitro-1H-imidazole-1-ethanol. The structural formula is shown as: Metronidazole is a white to pale yellow crystalline powder with a molecular formula of C 6 H 9 N 3 O 3 and a molecular weight of 171.2 g/mole. The pKa of metronidazole is 14.44 ± 0.10. The pH of a 1% aqueous solution of metronidazole is 5.5-7.5. It is slightly soluble in water, acetone, alcohol, and methylene chloride. LIKMEZ is an oral suspension containing 500 mg of metronidazole per 5 mL, and the following inactive ingredients: Glycerin, magnesium aluminum silicate, methylparaben, microcrystalline cellulose, natural peppermint flavor, natural strawberry flavor, propylparaben, purified water, sodium phosphate dibasic, sodium phosphate monobasic, sucralose, and sucrose. Structure

How to use

Trichomoniasis: Adult Female and Male Patients: One-day treatment: 2 g (20 mL) of LIKMEZ, given either as a single oral dose or in 2 divided oral doses of 1 g (10 mL) each, given on the same day. ( 2.1 ) Seven-day course of treatment: 250 mg (2.5 mL) of LIKMEZ given three times daily for 7 consecutive days. ( 2.1 ) Individualize the dosing regimen. ( 2.1 ) Amebiasis: Adult Patients: For acute intestinal amebiasis (acute amebic dysentery): 750 mg (7.5 mL) orally three times daily for 5 days to 10 days. ( 2.2 ) For amebic liver abscess: 500 mg (5 mL) or 750 mg (7.5 mL) orally three times daily for 5 days to 10 days. ( 2.2 ) Pediatric Patients : 35 mg/kg/24 hours to 50 mg/kg/24 hours, divided into three doses, to a maximum dose of 2,250 mg/24 hours (maximum dose 750 mg/dose or 7.5 mL/dose),orally for 10 days. ( 2.2 ) Anaerobic Bacterial Infections: In the treatment of most serious anaerobic infections, intravenous metronidazole is usually administered initially. ( 2.3 ) Adult Patients: 7.5 mg/kg every six hours (approx. 500 mg (5 mL) for a 70-kg adult) to a maximum dose of 4 g (40 mL) during a 24-hour period, orally for 7 to 10 days. ( 2.3 ) Infections of the bone and joint, lower respiratory tract, and endocardium may require longer treatment. ( 2.3 ) Patients with Severe Hepatic Impairment (Child-Pugh C) Reduce the dose of LIKMEZ by 50%. ( 2.4 ) Patients Undergoing…

Side effects

The following clinically significant adverse reactions are described elsewhere in the labeling: Central and Peripheral Nervous System Effects [ see Warnings and Precautions (5.2) ] Blood Dyscrasias [ see Warnings and Precautions (5.4 )] Common adverse reactions include nausea, headache, anorexia, vomiting, diarrhea, abdominal cramping, epigastric distress, and constipation. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Saptalis Pharmaceuticals, LLC at 1-833-727-8254 or FDA at 1-800-FDA-1088 or http://www.fda.gov/medwatch . 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The following reactions have been reported during treatment with metronidazole: Central and Peripheral Nervous System: The most serious adverse reactions reported in patients treated with metronidazole have been convulsive seizures, encephalopathy, aseptic meningitis, optic and peripheral neuropathy, the latter characterized mainly by numbness or paresthesia of an extremity. Persistent peripheral neuropathy has been reported in some patients receiving prolonged administration of metronidazole. In addition, headache, syncope, dizziness, vertigo, incoordination,…

FDA Boxed Warning (the FDA’s most serious warning)

Boxed (black-box) warning — from the FDA label

Metronidazole has been shown to be carcinogenic in mice and rats [ see Warnings and Precautions (5.1) ] . Avoid unnecessary use of LIKMEZ. Reserve LIKMEZ for use in the following indications: trichomoniasis [see Indications and Usage (1.1) ] , amebiasis [ see Indications and Usage (1.2) ] and anaerobic bacterial infections [ see Indications and Usage (1.3) ]. WARNING: POTENTIAL FOR CARCINOGENICITY See full prescribing information for complete boxed warning. Metronidazole has been shown to be carcinogenic in mice and rats ( 5.1 ). Avoid unnecessary use of LIKMEZ. Reserve LIKMEZ for use in the following indications: trichomoniasis ( 1.1 ), amebiasis ( 1.2 ) and anaerobic bacterial infections ( 1.3 ).

Warnings

Important safety information

Central and Peripheral Nervous System Effects: Encephalopathy, convulsive seizures, aseptic meningitis and peripheral neuropathy have been reported with metronidazole. Promptly evaluate the benefit/risk of continuation of LIKMEZ if abnormal neurological signs develop. ( 5.2 ) Blood Dyscrasias : Use LIKMEZ with care in patients with a history of blood dyscrasias. LIKMEZ may cause mild transient leukopenia. ( 5.4 ) 5.1 Potential for Carcinogenicity Metronidazole has been shown to be carcinogenic in mice and rats. Tumors affecting the liver, lungs, mammary, and lymphatic tissues have been detected in several studies of metronidazole in rats and mice, but not hamsters [ see Nonclinical Toxicology (13.1) ] . Avoid unnecessary use of LIKMEZ. Reserve LIKMEZ for use in the following indications: trichomoniasis [ see Indications and Usage (1.1) ] , amebiasis [ see Indications and Usage (1.2) ] and anaerobic bacterial infections [ see Indications and Usage (1.3) ]. 5.2 Central and Peripheral Nervous System Effects Encephalopathy, aseptic meningitis, peripheral neuropathy (including optic neuropathy) and convulsive seizures have been reported with metronidazole. Encephalopathy has been reported in association with cerebellar toxicity characterized by ataxia, dizziness, and dysarthria. CNS lesions seen on MRI have been described in reports of encephalopathy. CNS symptoms are generally reversible within days to weeks upon discontinuation of metronidazole. CNS lesions seen on MRI have also been described as reversible. Peripheral neuropathy, mainly of sensory type has been reported and is characterized by numbness or paresthesia of an extremity. Cases of aseptic meningitis have been reported with metronidazole [ see Adverse Reactions (6.1) ] . Symptoms may occur within hours of dose administration and generally resolve after metronidazole therapy is discontinued. The appearance of abnormal neurological signs and symptoms demands the prompt evaluation of the benefit/risk ratio of the continuation of therapy. 5.3 Fungal Superinfections Known or previously unrecognized candidiasis may present more prominent symptoms during therapy with LIKMEZ and requires treatment with an antifungal agent. 5.4 Blood Dyscrasias LIKMEZ is a nitroimidazole and should be used with care in patients with evidence of or history of blood dyscrasia. A mild leukopenia has been observed during metronidazole administration; however, no persistent hematologic abnormalities attributable to metronidazole have been observed in clinical studies. Total and differential leukocyte counts are recommended before and after therapy [ see Adverse Reactions (6.1) ] . 5.5 Drug-Resistant Bacteria Prescribing LIKMEZ in the absence of a proven or strongly suspected bacterial infection or a prophylactic indication is unlikely to provide benefit to the patient and increases the risk of the development of drug-resistant bacteria.

Who should not take Likmez

Prior history of hypersensitivity to metronidazole or other nitroimidazole derivatives ( 4.1 ) Patients who have used disulfiram within the last two weeks. ( 4.2 , 7.1 ) Patients who consume alcohol or products containing propylene glycol during and for at least three days after LIKMEZ therapy. ( 4.3 , 7.2 ) Patients with Cockayne syndrome ( 4.4 , 6.2 ) 4.1 Hypersensitivity Reactions LIKMEZ is contraindicated in patients with known hypersensitivity to metronidazole or other nitroimidazole derivatives [ see Adverse Reactions (6.1) ] . 4.2 Psychotic Reactions with Disulfiram LIKMEZ is contraindicated in patients who have used disulfiram within the last two weeks. Use of oral metronidazole is associated with psychotic reactions in alcoholic patients who were using disulfiram concurrently [ see Drug Interactions (7.1) ] . 4.3 Interaction with Alcohol LIKMEZ is contraindicated in patients who consume alcohol or products containing propylene glycol during and for at least three days after LIKMEZ therapy. Use of oral metronidazole is associated with a disulfiram-like reaction to alcohol, including abdominal cramps, nausea, vomiting, headaches, and flushing [ see Drug Interactions (7.2) ] . 4.4 Cockayne Syndrome LIKMEZ is contraindicated in patients with Cockayne syndrome. Severe irreversible hepatotoxicity/acute liver failure with fatal outcomes have been reported after initiation of metronidazole in patients with Cockayne syndrome [ see Adverse Reactions (6.2) ] .

Overdose — what happens if you take too much

General Single oral doses of metronidazole, up to 15 g (7.5 times the maximum recommended single dose), have been reported in suicide attempts and accidental overdoses. Symptoms reported include nausea, vomiting, and ataxia. Metronidazole is dialyzable. Neurotoxic effects, including seizures and peripheral neuropathy, have been reported after 5 days to 7 days of doses of 6 g to 10.4 g every other day (3 times to 5.2 times the maximum recommended single dose). Treatment of Overdosage There is no specific antidote for metronidazole overdose; therefore, management of the patient should consist of symptomatic and supportive therapy.

U.S. Poison Control: call or text 1-800-222-1222 (free, 24/7). In an emergency call 911. From the FDA label; not medical advice.

Interactions

Disulfiram: Psychotic reactions can occur in patients who are using LIKMEZ and disulfiram concurrently. ( 4.2 , 7.1 ) Alcohol or Other Products Containing Propylene Glycol: Abdominal cramps, nausea, vomiting, headaches, and flushing can occur in patients who are using LIKMEZ and alcohol or other products containing propylene glycol concurrently. ( 4.3 , 7.2 ) Warfarin and Other Oral Anticoagulants : LIKMEZ can potentiate the anticoagulant effect. Carefully monitor prothrombin time and International Normalized Ratio (INR). ( 7.3 ) Lithium: Increased lithium serum concentrations; measure serum lithium and serum creatinine concentrations during therapy. ( 7.4 ) Busulfan : Increased busulfan serum concentrations; avoid concomitant use, monitor for plasma concentrations and adjust the busulfan dose accordingly. ( 7.5 ) CYP Inducers and CYP Inhibitors : Prolonged or accelerated half-life of metronidazole or concomitant medications. ( 7.6 , 7.7 ) Drugs with the Potential for Prolonging the QT Interval: QT prolongation when used with LIKMEZ ( 7.8 ) Interference with Laboratory Tests: Metronidazole may interfere with certain serum chemistry laboratory values ( 7.9 ) 7.1 Disulfiram Psychotic reactions have been reported in alcoholic patients who are using metronidazole and disulfiram concurrently. LIKMEZ is contraindicated in patients who have taken disulfiram within the last two weeks [ see Contraindications (4.2) ] . 7.2 Alcoholic Beverages LIKMEZ is contraindicated in patients who consume alcohol or products containing propylene glycol during and for at least 3 days after therapy with LIKMEZ. Use of LIKMEZ with alcohol or other products containing propylene glycol is associated with a disulfiram-like reaction (abdominal cramps, nausea, vomiting, headaches, and flushing) [ see Contraindications (4.3) ] . 7.3 Warfarin and other Oral Anticoagulants Metronidazole has been reported to potentiate the anticoagulant effect of warfarin and other oral coumarin anticoagulants, resulting in a prolongation of prothrombin time. When LIKMEZ is prescribed for patients on this type of anticoagulant therapy, prothrombin time and INR should be carefully monitored. 7.4 Lithium In patients stabilized on relatively high doses of lithium, short-term use of LIKMEZ has been associated with elevation of serum lithium concentrations and signs of lithium toxicity due to the interaction between metronidazole and lithium. Monitor serum lithium and serum creatinine concentrations for several days after beginning treatment with LIKMEZ to detect any increase that may precede clinical symptoms of lithium toxicity. 7.5 Busulfan Metronidazole has been reported to increase plasma concentrations of busulfan, which can result in an increased risk for serious busulfan toxicity. Do not administer LIKMEZ concomitantly with busulfan unless the benefit outweighs the risk. If no therapeutic alternatives to LIKMEZ are available, and concomitant administration with busulfan is medically needed, monitor for busulfan plasma concentrations and adjust the busulfan dose accordingly. 7.6 Inhibitors of CYP450 Liver Enzymes The simultaneous administration of LIKMEZ and drugs that decrease microsomal liver enzymes, such as cimetidine, may prolong the half-life and decrease plasma clearance of metronidazole. 7.7 Inducers of CYP450 Liver Enzymes The simultaneous administration of LIKMEZ and drugs that induce microsomal liver enzymes, such as phenytoin or phenobarbital, may accelerate the elimination of metronidazole, resulting in reduced plasma concentrations of metronidazole. Impaired clearance of phenytoin has also been reported. 7.8 Drugs that Prolong the QT Interval QT prolongation has been reported, particularly when metronidazole was administered with drugs with the potential for prolonging the QT interval. 7.9 Drug/Laboratory Test Interactions Metronidazole may interfere with certain types of determinations of serum chemistry values, such as aspartate aminotransferase (AST, SGOT), alanine aminotransferase (ALT, SGPT), lactate dehydrogenase (LDH), triglycerides, and glucose hexokinase. Values of zero may be observed. All of the assays in which interference has been reported involve enzymatic coupling of the assay to oxidation-reduction of nicotinamide adenine dinucleotide (NAD + ⇌ NADH). Interference is due to the similarity in absorbance peaks of NADH (340 nm) and metronidazole (322 nm) at pH 7.

Foods & drinks to be careful with

Well-established interactions for this medicine’s drug class, summarized from public health authorities. General information, not medical advice — always confirm with your pharmacist or the label.

  • Alcohol

    Watch out for: beer, wine, spirits, and other products containing alcohol.

    Combining alcohol with this antibiotic can cause a disulfiram-like reaction — flushing, nausea, vomiting, headache, and a fast heartbeat.

    What to do: Avoid alcohol while taking it and for a few days after your last dose, as your prescriber or the label directs. Alcohol can hide in some liquid medicines and mouthwashes.

    Source: Metronidazole — MedlinePlus (U.S. National Library of Medicine)

How long does Metronidazole stay in your body?

The elimination half-life of metronidazole is about 8 hours — the time it takes the body to clear about half of it. As a rule of thumb, a medicine is mostly gone after roughly 4 to 5 half-lives, though this varies from person to person with age and kidney or liver function. This is the average for healthy adults with normal kidney and liver function; the half-life is much longer in newborns (roughly 22 to 109 hours, longer the more premature the baby). Metronidazole has an active metabolite (hydroxy-metronidazole) whose levels build up in older adults (40-80% higher) and in severe kidney disease, though the label does not give a separate half-life for it.

This is general information, not medical advice. It doesn’t tell you when a drug test would read negative (tests detect substances for different, often longer, windows) or when it’s safe to take another dose — ask your pharmacist or prescriber. Source: FLAGYL (metronidazole) label, DailyMed.

Drug class

How this class works, per Metronidazole - StatPearls - NCBI Bookshelf.

May treat (source: NIH RxClass)

See how Likmez ranks — best-rated nitroimidazole antimicrobial for:

Dosage forms

Suspension

The forms currently marketed in the U.S., per the FDA National Drug Code Directory.

Ways to save

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Frequently asked questions

What does Likmez treat?
Likmez (Metronidazole) may be used to treat abscess, amebiasis, bacteroides infections, bacterial endocarditis, pseudomembranous enterocolitis, giardiasis, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
How does Likmez work?
Likmez is a nitroimidazole antimicrobial. Nitroimidazole antibiotics (such as metronidazole) are activated inside oxygen-free bacteria and parasites, where they turn into reactive forms that break and destabilize the microbe's DNA. This kills the germ while largely sparing the body's own cells.
How much does Likmez cost?
Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $0.10 per gm, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins.
Is there a coupon or discount for Likmez?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Likmez. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
Who makes Likmez?
Likmez is marketed by Saptalis Pharms. You can see Saptalis Pharms's full profile, rating, and other products on pharmaranks.
Is Likmez a brand-name or generic drug?
Likmez is a brand-name product with the active ingredient Metronidazole. Lower-cost generic equivalents containing Metronidazole are available — ask your pharmacist.
Is Likmez available over the counter?
No. Likmez is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
What forms does Likmez come in?
Likmez is currently marketed as suspension, per the FDA's National Drug Code Directory.
What class of drug is Likmez?
Likmez is classified as nitroimidazole antimicrobial, per the FDA's Established Pharmacologic Class.
Is Likmez FDA-registered?
Likmez is on record with the U.S. FDA under application number NDA216755. You can verify this on its official FDA label.
Is Likmez safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Likmez. Review its FDA-label side effects and warnings below, and always consult a licensed professional.
What are the side effects of Likmez?
Likmez's side effects are taken directly from its FDA label. From the label: The following clinically significant adverse reactions are described elsewhere in the labeling: Central and Peripheral Nervous System Effects [ see Warnings and Precautions (5.2) ] Blood Dyscrasias [ see Warnings and Precautions (5.4 )] Common adverse reactions include nausea, headache, anorexia,… Both common and serious reactions are documented in full on this page. This is general reference from the FDA, not medical advice — always consult a professional.

Clinical content sourced from the FDA label via openFDA (U.S. FDA). View the FDA label on DailyMed → Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.

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