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impavido

Impavido (Miltefosine) is an antileishmanial used to treat Visceral Leishmaniasis, Cutaneous Leishmaniasis.

Miltefosine · by Knight Theraps

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Active ingredient
Miltefosine
Drug class
Antileishmanial
Form
Capsule
Strength
Miltefosine 50MG
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Knight Theraps
FDA application
NDA204684

What is Impavido?

From the FDA label:IMPAVIDO capsules contain the active ingredient miltefosine, an antileishmanial agent. The chemical name of miltefosine is 2-[[(hexadecyloxy)hydroxyphosphenyl]oxy]-N,N,N-trimethylethylammonium inner salt. Miltefosine is a white powder that is freely soluble in water, 0.1 N HCl or NaOH, methanol, and ethanol. It has the empirical formula of C 21 H 46 NO 4 P with a molecular weight of 407.6 and the following structural formula: The inactive ingredients are colloidal silicon dioxide, microcrystalline cellulose, lactose monohydrate, talc, and magnesium stearate. The capsule shell contains gelatin, titanium dioxide, ferric oxide, and purified water. Structural Formula

How to use

The treatment duration is 28 consecutive days. Administer with food to ameliorate gastrointestinal adverse reactions. Table 1: Miltefosine Dosage Weight Dosage and Administration 30 kg to 44 kg One 50 mg capsule twice daily with food (breakfast and dinner) 45 kg or greater One 50 mg capsule three times daily with food (breakfast, lunch, and dinner) Administer with food to ameliorate gastrointestinal adverse reactions. 30 to 44 kg: one 50 mg capsule twice daily for 28 consecutive days ( 2 ). 45 kg or greater: one 50 mg capsule three times daily for 28 consecutive days ( 2 ).

Side effects

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. Adverse reactions occurring in ≥2% of patients include nausea, vomiting, diarrhea, headache, decreased appetite, dizziness, abdominal pain, pruritus, somnolence, elevated transaminases, and elevated creatinine (6.1). To report SUSPECTED ADVERSE REACTIONS, contact Profounda, Inc. at 1-866-588-5405 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Visceral Leishmaniasis One Phase 3 trial was conducted in patients ≥ 12 years of age in India. Two-hundred and ninety-nine (299) patients (211 men and 88 women) received oral IMPAVIDO at a target dose of 2.5 mg/kg/day for 28 days (50 mg capsule once daily if weight was less than 25 kg and 50 mg capsule twice daily if weight was 25 kg or greater). Patients ranged between 12 and 64 years of age. Weight ranged between 15 and 67 kg (mean weight 38.6 kg) and BMI ranged between 8.2 and 24 (mean 16.1). Ninety-nine (99) patients received 1 mg/kg/day amphotericin B deoxycholate intravenously every other day for 15 doses. A statistically significant higher percentage of men received IMPAVIDO compared to amphotericin B. Less than 1% of patients who received…

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

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

EMBRYO-FETAL TOXICITY IMPAVIDO may cause fetal harm. Fetal death and teratogenicity occurred in animals administered miltefosine at doses lower than the recommended human dose. Do not administer IMPAVIDO to pregnant women. Obtain a serum or urine pregnancy test in females of reproductive potential prior to prescribing IMPAVIDO. Females of reproductive potential should be advised to use effective contraception during IMPAVIDO therapy and for 5 months after therapy [see Contraindications ( 4.1 ), Warnings and Precautions ( 5.1 ), Use in Specific Populations ( 8.1 , 8.8 ) and Nonclinical Toxicology ( 13.1 )] . WARNING: EMBRYO-FETAL TOXICITY See full prescribing information for complete boxed warning. IMPAVIDO may cause fetal harm. Fetal death and teratogenicity, occurred in animals administered miltefosine at doses lower than the recommended human dose. Do not administer IMPAVIDO to pregnant women. Obtain a serum or urine pregnancy test in females of reproductive potential prior to prescribing IMPAVIDO. Advise females of reproductive potential to use effective contraception during therapy and for 5 months after therapy ( 4.1 , 5.1 , 8.1 , 8.8 , 13.1 ).

Warnings

Important safety information

Embryo-Fetal Toxicity. Do not use in pregnant women. Obtain a urine or serum pregnancy test prior to initiation of therapy. Advise use of effective contraception in females of reproductive potential ( Boxed Warning , 5.1 , 8.1 , 8.8 , 13.1 ). Reproductive effects. Miltefosine caused testicular atrophy and impaired fertility in male rats and impaired fertility in female rats. Advise patients of reproductive toxicities in animal studies and that the potential effects on human fertility have not been adequately evaluated ( 13.1 ). Renal Effects. Monitor serum creatinine during therapy and for 4 weeks after end of therapy ( 5.3 , 6.1 ). Hepatic Effects. Monitor transaminases and bilirubin during therapy ( 5.4 , 6.1 ). Gastrointestinal Effects. Encourage fluid intake ( 5.5 ). Thrombocytopenia. Monitor platelet count during therapy for visceral leishmaniasis ( 5.6 , 6.1 ). Absorption of Oral Contraceptives. Advise use of alternative method of contraception if vomiting and/or diarrhea occur ( 5.7 ). Stevens-Johnson syndrome. Discontinue IMPAVIDO ( 5.8 ). 5.1 Embryo-Fetal Toxicity Miltefosine may cause fetal harm. Embryo-fetal toxicity, including death and teratogenicity, was observed in animals administered miltefosine prior to mating, during early pregnancy, and during organogenesis at doses lower than the maximum recommended human dose (MRHD). Do not use IMPAVIDO in pregnant women. Obtain a urine or serum pregnancy test prior to prescribing IMPAVIDO to females of reproductive potential. Advise females of reproductive potential to use effective contraception during IMPAVIDO therapy and for 5 months after completion of therapy [see Boxed Warning , Contraindications ( 4.1 ) and Use in Specific Populations ( 8.1 , 8.8 )] . 5.2 Reproductive Effects Females Miltefosine caused impaired fertility in rats and reversible follicular atresia and diestrus in dogs at doses approximately 1.0 and 0.2 times respectively the MRHD based on body surface area comparisons [see Nonclinical Toxicology ( 13.1 )] . Effects on human female fertility have not been formally studied. Males Miltefosine caused reduced viable sperm counts and impaired fertility in rats at doses approximately 0.4 times the MRHD [see Nonclinical Toxicology ( 13.1 ) ] . A higher dose in rats, approximately 1.0 times the MRHD, caused testicular atrophy and impaired fertility that did not fully reverse 10 weeks after drug administration ended. Scrotal pain and decreased or absent ejaculation during therapy have been reported during IMPAVIDO therapy [see Adverse Reactions ( 6.2 ) ] . The effects of IMPAVIDO on human male fertility have not been adequately studied. Advise women and men of the animal fertility findings, and that the potential for impaired fertility with IMPAVIDO therapy in humans has not been adequately evaluated. 5.3 Renal Effects Elevations of serum creatinine (Cr) were noted in clinical trials evaluating IMPAVIDO in the treatment of cutaneous, mucosal and visceral leishmaniasis. Monitor renal function weekly in patients receiving IMPAVIDO during therapy and for 4 weeks after end of therapy [see Adverse Reactions ( 6.1 )] . 5.4 Hepatic Effects Elevations in liver transaminases (ALT, AST) and bilirubin were noted in clinical trials evaluating IMPAVIDO in the treatment of visceral leishmaniasis. Monitor liver transaminases (ALT, AST) and bilirubin during therapy in patients receiving IMPAVIDO [see Adverse Reactions ( 6.1 )] . 5.5 Gastrointestinal Effects Vomiting and/or diarrhea commonly occur during IMPAVIDO administration and may result in volume depletion. Encourage fluid intake to avoid volume depletion [see Adverse Reactions ( 6.1 )] . 5.6 Thrombocytopenia Thrombocytopenia during therapy has been reported in patients treated for visceral leishmaniasis. Monitor platelet count during therapy for visceral leishmaniasis [see Adverse Reactions ( 6.1 , 6.2 )] . 5.7 Absorption of Oral Contraceptives Vomiting and/or diarrhea occurring during IMPAVIDO therapy may affect the absorption of oral contraceptives, and therefore compromise their efficacy. If vomiting and/or diarrhea occur during IMPAVIDO therapy, advise females to use additional non-hormonal or alternative method(s) of effective contraception. 5.8 Stevens-Johnson Syndrome Stevens-Johnson syndrome has been reported during IMPAVIDO therapy. Discontinue IMPAVIDO if an exfoliative or bullous rash is noted during therapy [see Adverse Reactions ( 6.1 )] .

Who should not take Impavido

Pregnancy ( 4.1 , 8.1 , 8.8 , 13.1 ). Sjögren-Larsson-Syndrome ( 4.2 , 12.3 ). Hypersensitivity to miltefosine or any of its excipients ( 4.3 ). 4.1 Pregnancy IMPAVIDO may cause fetal harm. IMPAVIDO is contraindicated in pregnant women. Obtain a urine or serum pregnancy test prior to prescribing IMPAVIDO [see Boxed Warning and Use in Specific Populations ( 8.1 )] . 4.2 Sjögren-Larsson-Syndrome IMPAVIDO is contraindicated in patients who have Sjögren-Larsson-Syndrome [see Clinical Pharmacology ( 12.3 )] . 4.3 Hypersensitivity IMPAVIDO is contraindicated in patients who are hypersensitive to miltefosine or any IMPAVIDO excipients.

Overdose — what happens if you take too much

The common adverse effects of vomiting, diarrhea, and abdominal pain are likely in case of overdose. Institute adequate hydration to prevent the risk of impaired renal function, and replace electrolytes as necessary. Because miltefosine is only slightly excreted in the urine, forced diuresis will not increase miltefosine excretion. Gastrointestinal lavage is of unknown value. A specific antidote to treat miltefosine overdose is not known.

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

In vitro and animal metabolism studies showed that miltefosine did not markedly induce or inhibit the activity of the major human cytochrome P450 enzymes [see Clinical Pharmacology ( 12.3 )] . The potential of miltefosine to interact with drug transporters has not been evaluated. IMPAVIDO did not inhibit human cytochrome P450 enzymes in vitro. IMPAVIDO did not induce cytochrome 3A activity in rats( 7 , 12.3 ).

Drug class

May treat (source: NIH RxClass)

Dosage forms

Capsule

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

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Frequently asked questions

What does Impavido treat?
Impavido (Miltefosine) may be used to treat visceral leishmaniasis, cutaneous leishmaniasis, 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.
Is there a coupon or discount for Impavido?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Impavido. 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 Impavido?
Impavido is marketed by Knight Theraps. You can see Knight Theraps's full profile, rating, and other products on pharmaranks.
Is Impavido a brand-name or generic drug?
Impavido is a brand-name product with the active ingredient Miltefosine.
Is Impavido available over the counter?
No. Impavido 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 Impavido come in?
Impavido is currently marketed as capsule, per the FDA's National Drug Code Directory.
What class of drug is Impavido?
Impavido is classified as antileishmanial, per the FDA's Established Pharmacologic Class.
Is Impavido FDA-registered?
Impavido is on record with the U.S. FDA under application number NDA204684. You can verify this on its official FDA label.
Is Impavido safe?
There's no single safe-or-not verdict, and we don't yet have a composite recall-safety score for Impavido. Review its FDA-label side effects and warnings below, and always consult a licensed professional.
What are the side effects of Impavido?
Impavido's side effects are taken directly from its FDA label. From the label: 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.… 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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