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Impavido Side Effects

Generic Name: miltefosine

Note: This page contains information about the side effects of miltefosine. Some of the dosage forms included on this document may not apply to the brand name Impavido.

In Summary

Common side effects of Impavido include: nausea, diarrhea, increased serum creatinine, and vomiting. See below for a comprehensive list of adverse effects.

For the Consumer

Applies to miltefosine: oral capsule

In addition to its needed effects, some unwanted effects may be caused by miltefosine (the active ingredient contained in Impavido). In the event that any of these side effects do occur, they may require medical attention.

Major Side Effects

You should check with your doctor immediately if any of these side effects occur when taking miltefosine:

Incidence not known:
  • Abdominal or stomach pain
  • bloating or swelling of the face, arms, hands, lower legs, or feet
  • bloody, black, or tarry stools
  • chills or fever
  • dizziness
  • itching or rash
  • pain in the scrotum
  • pinpoint red spots on the skin
  • smaller amount of semen ejaculated than usual
  • severe diarrhea or vomiting
  • unusual bleeding or bruising
  • unusual tiredness or weakness
  • yellow eyes or skin

Minor Side Effects

Some of the side effects that can occur with miltefosine may not need medical attention. As your body adjusts to the medicine during treatment these side effects may go away. Your health care professional may also be able to tell you about ways to reduce or prevent some of these side effects. If any of the following side effects continue, are bothersome or if you have any questions about them, check with your health care professional:

More common:
  • Decreased appetite
  • diarrhea
  • fever
  • lack or loss of strength
  • vomiting
Less common:
  • General feeling of discomfort or illness
  • itching skin
  • sleepiness or unusual drowsiness

For Healthcare Professionals

Applies to miltefosine: oral capsule


The most common side effects resulting in discontinuation were Stevens-Johnson syndrome, melena, thrombocytopenia, arthritis, skin rash, diarrhea, and hyperbilirubinemia.[Ref]


Very common (10% or more): Elevations in liver transaminases (ALT, AST) (up to 50%)
Frequency not reported: Hyperbilirubinemia
Postmarketing reports: Jaundice[Ref]


Very common (10% or more): Creatinine elevations (up to 25%)[Ref]


Common (1% to 10%): Anemia, lymphoadenopathy
Postmarketing reports: Thrombocytopenia, agranulocytosis, epistaxis[Ref]


Common (1% to 10%): Pruritus, cellulitis, ecthyma, pyoderma, rash, urticaria
Frequency not reported: Stevens-Johnson syndrome, skin rash[Ref]


Very common (10% or more): Diarrhea (up to 20.4%), vomiting (up to 27.5%), abdominal pain (up to 11.2%), nausea (up to 41.7%)
Common (1% to 10%): Abdominal distension, constipation, dysphagia, flatulence
Postmarketing reports: Melena[Ref]


Common (1% to 10%): Testicular pain, testicular swelling
Postmarketing reports: Scrotal pain, decreased ejaculate volume, absent ejaculation[Ref]


Common (1% to 10%): Lymphangitis, abscess[Ref]


Very common (10% or more): Decreased appetite (up to 23.1%)
Postmarketing reports: Generalized edema[Ref]


Frequency not reported: Arthritis[Ref]

Nervous system

Very common (10% or more): Motion sickness (29.2%), headache (28.1%), dizziness (up to 12.5%)
Common (1% to 10%): Somnolence, paresthesia[Ref]


Common (1% to 10%): Asthenia, malaise, pyrexia, fatigue, peripheral edema[Ref]


1. "Product Information. Impavido (miltefosine)." Paladin Therapeutics Inc, Wilmington, DE.

Not all side effects for Impavido may be reported. You should always consult a doctor or healthcare professional for medical advice. Side effects can be reported to the FDA here.

Disclaimer: Every effort has been made to ensure that the information provided is accurate, up-to-date and complete, but no guarantee is made to that effect. In addition, the drug information contained herein may be time sensitive and should not be utilized as a reference resource beyond the date hereof. This material does not endorse drugs, diagnose patients, or recommend therapy. This information is a reference resource designed as supplement to, and not a substitute for, the expertise, skill , knowledge, and judgement of healthcare practitioners in patient care. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate safety, effectiveness, or appropriateness for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of materials provided. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the substances you are taking, check with your doctor, nurse, or pharmacist.