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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Foot Powder
Generic Name
Miconazole Nitrate
Active Ingredient
MiconazoleCategory
Corticosteroid [EPC]
Salt Form
Nitrate
Variants
1
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 20 mg/g | POWDER | TOPICAL | 0363-7999 |
Detailed information about Foot Powder
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Foot Powder, you must consult a qualified healthcare professional.
Miconazole is a potent imidazole antifungal agent used to treat various fungal and yeast infections, including candidiasis and tinea. It primarily works by disrupting fungal cell membrane synthesis.
Standard dosing for Miconazole depends entirely on the formulation and the location of the infection. According to clinical guidelines:
Miconazole is generally considered safe for pediatric use when used topically for skin infections.
Because systemic absorption of topical and vaginal Miconazole is extremely low, dosage adjustments are generally not required for patients with kidney disease. However, patients with end-stage renal disease should be monitored if using systemic (buccal) forms.
Miconazole is metabolized by the liver. While topical use is unlikely to cause issues, healthcare providers may exercise caution when prescribing the buccal tablet (Oravig) to patients with severe hepatic impairment (liver failure).
No specific dosage adjustments are required for geriatric patients. Clinical trials have shown that the efficacy and safety profile in the elderly is similar to that in younger adults, though skin fragility in the elderly should be considered when applying topical creams.
Proper administration is key to the success of antifungal therapy:
If you miss a dose, apply or insert it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and resume your regular schedule. Do not double the amount to 'catch up,' as this may increase the risk of local irritation.
Systemic overdose of Miconazole is highly unlikely due to its poor absorption. If accidental ingestion occurs (especially in children), symptoms may include nausea, vomiting, or abdominal pain. In the event of a suspected oral overdose, contact your local poison control center or seek emergency medical attention immediately.
> Important: Follow your healthcare provider's dosing instructions. Do not adjust your dose or stop treatment early without medical guidance, as this can lead to a recurrence of the infection.
Most patients tolerate Miconazole well, particularly in topical forms. However, local reactions at the site of application are common. These may include:
> Warning: Stop taking Miconazole and call your doctor immediately if you experience any of the following serious symptoms:
Miconazole is intended for short-term use (usually 1 to 4 weeks). Prolonged or chronic use without medical supervision can lead to:
No FDA black box warnings for Miconazole. Miconazole has a long-established safety profile when used as directed. It does not carry the severe cardiovascular or hepatic warnings associated with some systemic azole antifungals like ketoconazole.
Report any unusual symptoms to your healthcare provider. If you experience side effects, you may also report them to the FDA at 1-800-FDA-1088.
Before using Miconazole, it is essential to ensure that the condition being treated is actually a fungal infection. Miconazole will not treat viral infections (like herpes) or bacterial infections (like bacterial vaginosis). Using Miconazole for the wrong type of infection can delay proper treatment and may worsen the condition. If this is your first time experiencing vaginal symptoms, or if your skin rash does not improve within the first few days of treatment, consult your healthcare provider.
No FDA black box warnings for Miconazole.
For standard topical or vaginal use, routine laboratory monitoring is generally not required. However, for patients using the buccal tablet (Oravig) or those with underlying conditions:
Miconazole does not typically affect the central nervous system. It is considered safe to drive or operate heavy machinery while using this medication, as it does not cause drowsiness or impaired coordination.
While there is no direct contraindication between alcohol and topical Miconazole, it is generally advised to avoid excessive alcohol consumption if you are experiencing a systemic infection or oral thrush, as alcohol can irritate the oral mucosa and potentially weaken the immune response.
It is vital to complete the full course of treatment as prescribed by your doctor or as indicated on the product packaging. Stopping the medication too early, even if symptoms improve, may allow the fungus to continue growing, leading to a relapse of the infection.
> Important: Discuss all your medical conditions, including any history of liver disease or immune system disorders, with your healthcare provider before starting Miconazole.
While Miconazole is primarily used topically, it is a potent inhibitor of certain liver enzymes (CYP2C9 and CYP3A4) if any significant amount enters the bloodstream.
Miconazole use is not known to significantly interfere with common laboratory tests, such as blood glucose, electrolytes, or complete blood counts (CBC), unless a systemic hypersensitivity reaction occurs.
Mechanism of Interaction: Most Miconazole interactions occur via the inhibition of the Cytochrome P450 enzyme system. By 'clogging' these enzymes, Miconazole prevents the breakdown of other drugs, leading to their accumulation and subsequent toxicity.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, including those applied to the skin or used vaginally.
Conditions where Miconazole must NEVER be used include:
Conditions requiring a careful risk-benefit analysis by a healthcare provider:
Patients should be aware that Miconazole belongs to a chemical family called the imidazoles. If you have experienced contact dermatitis or hives when using products like Lotrimin (clotrimazole) or Nizoral (ketoconazole), there is a high probability of a similar reaction to Miconazole. Always perform a small patch test if you have a history of sensitive skin or multiple drug allergies.
> Important: Your healthcare provider will evaluate your complete medical history, including any previous reactions to antifungal creams or suppositories, before prescribing Miconazole.
FDA Pregnancy Category C (Legacy system): Animal studies have shown some embryotoxic effects when Miconazole was administered orally at high doses. However, clinical studies in pregnant women using vaginal or topical Miconazole have not demonstrated an increased risk of birth defects or adverse pregnancy outcomes.
It is unknown whether Miconazole is excreted in human milk. However, because systemic absorption from topical or vaginal application is so low, it is considered likely compatible with breastfeeding.
Clinical data indicates no significant difference in safety or efficacy between elderly patients and younger adults. However, geriatric patients are more likely to be taking Warfarin, making the drug-drug interaction warning particularly critical for this population. Additionally, elderly patients with thinning skin (atrophy) should be monitored for increased local irritation.
No dosage adjustments are necessary for patients with impaired renal function when using topical or vaginal Miconazole. The drug is not significantly cleared by the kidneys in its topical form.
For topical and vaginal use, no adjustments are required. For the buccal tablet (Oravig), use with caution in patients with Child-Pugh Class C (severe) hepatic impairment, as the liver is the primary site of metabolism for the small amount of drug that is absorbed systemically.
> Important: Special populations require individualized medical assessment to ensure the safest and most effective treatment plan.
Miconazole is an imidazole antifungal that disrupts the biosynthesis of ergosterol, a vital component of the fungal cell membrane. It specifically inhibits the enzyme lanosterol 14-alpha-demethylase. By blocking this enzyme, Miconazole prevents the conversion of lanosterol to ergosterol. This leads to the accumulation of 14-alpha-methylsterols, which are toxic to the fungus and disrupt the packing of phospholipids in the membrane. This disruption increases membrane permeability, leading to the leakage of cellular contents and ultimately fungal cell death.
| Parameter | Value |
|---|---|
| Bioavailability | <1% (Topical), ~1-2% (Vaginal) |
| Protein Binding | 91% - 93% |
| Half-life | 24 hours (Systemic) |
| Tmax | 2 hours (Buccal) |
| Metabolism | Hepatic (CYP3A4) |
| Excretion | Fecal (~50%), Renal (~10-20%) |
Miconazole is classified as an Imidazole Antifungal. It is related to other medications such as clotrimazole, ketoconazole, and oxiconazole. It is distinct from the 'triazole' class (like fluconazole), which generally has better systemic absorption and a slightly different metabolic profile.
Common questions about Foot Powder
Miconazole is primarily used to treat fungal and yeast infections of the skin, mouth, and vagina. It is highly effective against vulvovaginal candidiasis (yeast infections), tinea pedis (athlete's foot), tinea cruris (jock itch), and tinea corporis (ringworm). Additionally, a specialized buccal tablet form is used to treat oropharyngeal candidiasis, also known as oral thrush. It works by destroying the fungal cell membrane, which stops the infection from spreading and allows the skin or mucosa to heal. Your healthcare provider may also recommend it for pityriasis versicolor, a condition that causes skin discoloration.
The most common side effects of Miconazole are localized and occur at the site of application. Patients frequently report mild burning, stinging, or itching immediately after applying the cream or inserting the vaginal suppository. In cases of vaginal use, an increase in discharge is common as the medication melts. Some individuals may experience mild skin redness or irritation. These symptoms are usually temporary and subside as the body adjusts to the medication. If irritation becomes severe or if you develop a rash elsewhere on your body, you should contact your healthcare provider.
There is no known direct interaction between alcohol and topical or vaginal Miconazole. Unlike some other antifungals like metronidazole, Miconazole does not cause a disulfiram-like reaction (nausea, vomiting, flushing) when combined with alcohol. However, if you are using the buccal tablet for oral thrush, alcohol may irritate the sensitive sores in your mouth and delay healing. It is always best to consume alcohol in moderation and consult your doctor if you have concerns about how it might affect your overall recovery from an infection.
Miconazole is generally considered safe for use during the second and third trimesters of pregnancy, particularly for treating vaginal yeast infections which are common during this time. Clinical studies have shown no significant increase in the risk of birth defects when used topically or vaginally. However, healthcare providers usually recommend the longer 7-day treatment course rather than the high-dose 1-day treatment to ensure the lowest possible systemic exposure. Always consult your obstetrician before starting any medication while pregnant, especially during the first trimester. They will help weigh the benefits of treatment against any potential risks.
Many patients begin to feel relief from symptoms like itching and burning within 24 to 48 hours of starting Miconazole. However, even if your symptoms disappear quickly, it is essential to complete the full course of treatment—whether it is 1, 3, 7, or 14 days. Stopping the medication early can allow the remaining fungi to multiply, leading to a return of the infection. For skin infections like athlete's foot, it may take up to 4 weeks of consistent use to completely clear the fungus. If your symptoms do not improve at all after several days, you should consult your doctor for a re-evaluation.
While you can technically stop using Miconazole at any time because it is not a drug that causes physical withdrawal, doing so before the infection is fully cleared is not recommended. Sudden discontinuation often leads to a relapse, where the fungal infection returns, sometimes more severely than before. To ensure the infection is completely eradicated, you should follow the specific timeframe provided on the product packaging or by your healthcare provider. If you are experiencing severe side effects that make it difficult to continue, contact your doctor to discuss alternative antifungal treatments rather than simply stopping the medication.
If you miss a dose of Miconazole, apply it as soon as you remember. If it is nearly time for your next scheduled dose, skip the missed one and continue with your regular routine. Do not apply extra cream or use two suppositories at once to make up for the missed dose, as this can increase the likelihood of skin or vaginal irritation. Consistency is key to successfully treating fungal infections, so try to use the medication at the same time each day, such as right before bed. If you miss multiple doses, the treatment may take longer to work.
There is no clinical evidence to suggest that Miconazole causes weight gain. Because Miconazole is applied topically or used locally in the vagina or mouth, very little of the medication enters the bloodstream. It does not affect the metabolic processes or hormones that typically govern weight. If you experience unexplained weight gain while using Miconazole, it is likely due to another factor or medication. You should discuss any significant changes in your weight or appetite with your healthcare provider to determine the underlying cause.
Miconazole can interact with several important medications, even when used topically. The most significant interaction is with the blood thinner Warfarin (Coumadin); Miconazole can increase the effect of Warfarin and lead to serious bleeding. It may also interact with certain oral medications for diabetes (sulfonylureas) and epilepsy (phenytoin). If you are using vaginal Miconazole, you should avoid using other vaginal products like tampons or douches at the same time. Always provide your healthcare provider with a full list of all prescription and over-the-counter medications you are currently using to avoid dangerous interactions.
Yes, Miconazole is widely available as a generic medication and is often much more affordable than brand-name versions like Monistat or Oravig. Generic Miconazole is required by the FDA to have the same active ingredient, strength, and efficacy as the brand-name versions. You can find generic Miconazole in various forms, including creams, powders, and vaginal suppositories, at most pharmacies and grocery stores. Whether you choose a brand-name or generic product, the antifungal action remains the same. Check the 'Active Ingredients' label on the packaging to confirm it contains Miconazole Nitrate.
Other drugs with the same active ingredient (Miconazole)