Flagyl (metronidazole) is classified as a nitroimidazole antibiotic and antiprotozoal agent. It functions by penetrating bacterial and protozoal cells, where it undergoes reductive activation by intracellular transport proteins. This reduction generates reactive intermediates that interact with DNA, leading to strand breakage, inhibition of nucleic acid synthesis, and ultimately cell death.
Metronidazole is particularly effective against anaerobic bacteria and certain protozoa due to its selective activation in low-oxygen environments. Clinically, it is used in the treatment of anaerobic infections, including those affecting the gastrointestinal tract, reproductive system, central nervous system, skin, and bloodstream. Additionally, it is a primary therapeutic agent for trichomoniasis, bacterial vaginosis, and infections caused by Clostridium difficile.
Key Takeaways
Availability: Flagyl (metronidazole) is available by prescription through certified online pharmacies, with DrugMart offering one of the lowest prices for a 30-tablet supply at just $52.80 (generic equivalent Flagyl). Unlike many telehealth platforms, DrugMart does not charge consultation fees, making it an ideal choice for cost-conscious patients. Purchase your prescription today.
How It Works: Flagyl (metronidazole) is a nitroimidazole antibiotic and antiprotozoal agent. It selectively activates in low-oxygen environments, allowing it to penetrate anaerobic bacterial and protozoal cells. Once inside, it generates reactive intermediates that disrupt DNA synthesis, ultimately leading to cell death. This mechanism makes it particularly effective for treating infections in the GI tract, reproductive system, bloodstream, skin, and central nervous system.
Common Side Effects: While generally well-tolerated, side effects may include headache, dizziness, nausea, metallic taste, stomach upset, and vaginal discomfort. Rare but serious side effects include seizures, peripheral neuropathy, allergic reactions, and liver toxicity. Patients should contact a healthcare provider if side effects are severe or persistent.
5 Places to Buy Flagyl (Metronidazole) Online
Flagyl (metronidazole) is a prescription antibiotic used to treat a variety of bacterial and parasitic infections, including those affecting the gastrointestinal tract, skin, and reproductive system. It is most commonly prescribed in 500 mg tablet form and is available as both a brand-name and generic equivalent medication.
Price Comparison – Adjusted to 30 Tablets (500 mg)
Provider | Adjusted Price (30 Tablets) | Tablet Strength | Prescription Required | Telehealth Included | Link |
DrugMart | $52.80 | 500 mg | Yes | No | |
PlanetDrugsDirect | $56.10 | 500 mg | Yes | No | |
SpeedyHealth | $96.41 | 500 mg | Yes | Yes | |
Starfish.com | $105.00 | 500 mg | Yes | Yes | |
Interlude | $115.71 | 500 mg | Yes | Yes |
Prices updated as of April 5, 2025. Prices reflect standard 500 mg formulations of generic equivalents. Actual cost may vary depending on consultation requirements, shipping, and provider policies.
Where to Buy Metronidazole (Generic Equivalent Flagyl) Online
1. DrugMart
CIPA-certified international pharmacy offering one of the most cost-effective options for purchasing generic equivalent Flagyl (metronidazole) in bulk without added telehealth costs that other providers would require.
Price: $52.80 for 30 tablets (500 mg)
Prescription Required: Yes
Consultation Included: No
2. PlanetDrugsDirect
CIPA-certified international pharmacy offering affordable generic equivalent Flagyl (metronidazole) with CIPA certification and no additional fees.
Price: $56.10 for 30 tablets (500 mg)
Prescription Required: Yes
Consultation Included: No
3. SpeedyHealth
Convenient telehealth provider offering fast prescriptions and delivery. Pricing does not include consultation.
Adjusted Price: $96.41 for 30 tablets (500 mg, estimated from 14-tablet pack)
Prescription Required: Yes
Consultation Included: Yes Order from SpeedyHealth
4. Starfish.com
Online provider with bundled pricing that includes telehealth. Ideal for patients needing quick prescription access.
Adjusted Price: $105.00 for 30 tablets (500 mg, estimated from 14-tablet pack)
Prescription Required: Yes
Consultation Included: Yes
5. Interlude
Offers discreet packaging and telehealth included in cost. Slightly higher price point but convenient access.
Adjusted Price: $115.71 for 30 tablets (500 mg, estimated from 14-tablet pack)
Prescription Required: Yes
Consultation Included: Yes
What is Flagyl (Metronidazole)?
Flagyl (metronidazole) is an antibiotic used to treat bacterial infections of the vagina, stomach, liver, skin, joints, brain and spinal cord, lungs, heart, or bloodstream. It is also prescribed for trichomoniasis, a sexually transmitted disease caused by a parasite. Typically, both sexual partners are treated simultaneously, even if one does not exhibit symptoms.
Warnings
Do not use Flagyl (metronidazole) if you recently drank alcohol or have taken disulfiram (Antabuse) within the past two weeks.
Avoid alcohol or products containing propylene glycol while taking Flagyl and for at least three days after stopping.
Discontinue use immediately and seek medical help if you experience neurological symptoms such as seizures, headaches, vision changes, weakness, numbness, or tingling.
Flagyl (metronidazole) does not treat viral infections such as the common cold or flu.
Animal studies have shown potential cancer risks, though it is unclear if this applies to humans. Consult your doctor for a risk assessment.
Before Taking Flagyl (Metronidazole)
You should not take Flagyl (metronidazole) if you are allergic to metronidazole, secnidazole, or tinidazole, or if you have:
Consumed alcohol in the past three days
Consumed foods or medicines containing propylene glycol in the past three days
Taken disulfiram (Antabuse) in the past 14 days
Are pregnant (especially in the first trimester)
Are breastfeeding (do not breastfeed within 24 hours of taking Flagyl)
Inform your doctor if you have a history of:
Liver or kidney disease
Heart rhythm disorders
Stomach or intestinal diseases such as Crohn's disease
Blood cell disorders such as anemia or low white blood cell counts
Fungal infections
Neurological disorders
How to Take Flagyl (Metronidazole)
Follow your doctor’s prescription exactly.
Flagyl (metronidazole) can be taken orally or via injection (administered by a healthcare provider).
Shake the oral suspension before use and measure doses carefully.
Do not crush, chew, or break extended-release tablets.
If treating a vaginal infection, your sexual partner may also need treatment.
Typically, Flagyl (metronidazole) is taken for up to 10 days. Some cases require repeat treatment after several weeks.
Continue using the medication even if symptoms improve to prevent resistance.
Store at room temperature, away from moisture and heat.
Missed Dose & Overdose
If you miss a dose, take it as soon as possible. Skip it if it’s almost time for the next dose. Do not take two doses at once.
In case of overdose, seek emergency medical attention. Symptoms may include nausea, vomiting, numbness, tingling, or muscle coordination issues.
Side Effects
Common and serious side effects include the following:
Common Side Effects
Headache, dizziness, weakness
Nausea, vomiting, loss of appetite, stomach pain
Diarrhea, constipation
Unpleasant metallic taste
Rash, itching
Vaginal itching or discharge, pain during sex
Mouth sores or swollen tongue
Serious Side Effects (Seek Medical Attention)
Severe allergic reactions (hives, difficulty breathing, swelling of the face or throat)
New or worsening infection symptoms
Painful or difficult urination
Confusion, fainting, vision problems
Numbness, tingling, or burning pain in hands or feet
Seizures or muscle weakness
Liver issues (nausea, stomach pain, dark urine, jaundice)
Increased sensitivity to light and neck stiffness
Drug Interactions
Inform your doctor about all medications you are taking, including:
Antidepressants
Asthma medications
Cancer treatments
Heart or blood pressure medications
Lithium or other psychiatric drugs
Medications for malaria, HIV, or infections
Blood thinners (e.g., warfarin, Coumadin)
This list is not exhaustive. Always consult your doctor or pharmacist before starting new medications.
For more information, consult your healthcare provider or visit the FDA website.
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Sources
U.S. Food and Drug Administration. (2021). Flagyl (metronidazole) tablets: Prescribing information. Retrieved from https://www.accessdata.fda.gov/drugsatfda_docs/label/2021/012623s069lbl.pdf
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