What You Should Know About Brexafemme Kit Side Effects

If your doctor has prescribed Brexafemme Kit (Ibrexafungerp) for a vaginal yeast infection, you're probably wondering what side effects to expect. Like all medications, Brexafemme Kit can cause side effects — but most are mild and go away on their own.

This guide covers the common and serious side effects reported in clinical trials, who may be at higher risk, and exactly when you should contact your doctor.

What Is Brexafemme Kit?

Brexafemme Kit is an oral antifungal medication made by Scynexis (with the NDA now transferred to GSK). It contains Ibrexafungerp, which belongs to a new class of antifungals called triterpenoid antifungals. It's FDA-approved for:

• Treating acute vulvovaginal candidiasis (VVC) — vaginal yeast infections
• Preventing recurrent vulvovaginal candidiasis (RVVC) in women who get frequent yeast infections

For a deeper look at how the drug works, see our guide on Brexafemme Kit's mechanism of action. For complete drug information, read What Is Brexafemme Kit?

Common Side Effects

The most frequently reported side effects in clinical trials were gastrointestinal (stomach and digestive) symptoms. These are listed below with the percentage of patients who experienced them:

• Diarrhea — 16.7% of patients
• Nausea — 11.9% of patients
• Abdominal pain — 11.4% of patients
• Dizziness — 3.3% of patients
• Vomiting — 2.0% of patients

These side effects are generally mild to moderate and typically resolve within a day or two. Since the acute VVC treatment is completed in just one day (four tablets total), most side effects are short-lived.

Why Are GI Side Effects So Common?

Brexafemme Kit is taken orally and passes through your digestive system. The medication's antifungal action can disrupt the balance of microorganisms in your gut temporarily, leading to digestive discomfort. This is similar to how antibiotics can cause stomach upset.

Serious Side Effects

Serious side effects with Brexafemme Kit are rare, but you should be aware of them:

Embryo-Fetal Toxicity

This is the most important safety concern. Brexafemme Kit is contraindicated in pregnancy. Animal studies showed that Ibrexafungerp can cause harm to a developing fetus. Your doctor should confirm you are not pregnant before prescribing this medication, and you should use effective contraception during treatment.

If you think you might be pregnant, do not take Brexafemme Kit. Talk to your doctor about safer alternatives like Miconazole (Monistat) or other topical treatments.

Severe Allergic Reactions

Although rare, allergic reactions can occur with any medication. Seek immediate medical attention if you experience:

• Difficulty breathing or swallowing
• Swelling of your face, lips, tongue, or throat
• Severe rash or hives
• Rapid heartbeat with lightheadedness

Specific Populations

Pregnant Women

Brexafemme Kit is strictly contraindicated during pregnancy. A pregnancy test is recommended before starting treatment. If you become pregnant while taking the monthly RVVC prevention regimen, stop taking the medication immediately and contact your doctor.

Breastfeeding Women

It is not known whether Ibrexafungerp passes into breast milk. Brexafemme Kit is not recommended during breastfeeding unless your doctor determines the benefits outweigh the risks. Discuss alternatives with your healthcare provider.

Adolescents

Brexafemme Kit is approved for postmenarchal pediatric females (those who have started their periods). The safety profile in this age group is expected to be similar to adults.

People With Liver Problems

If you have mild to moderate liver impairment, no dose adjustment is needed. However, Brexafemme Kit should be avoided in severe hepatic impairment (Child-Pugh C). Tell your doctor about any liver conditions before starting treatment.

People With Kidney Problems

No dose adjustment is necessary for mild to moderate kidney impairment. Your doctor will assess whether Brexafemme Kit is appropriate based on your overall health.

How to Manage Common Side Effects

If you experience mild side effects, these tips can help:

For Diarrhea

• Stay hydrated — drink plenty of water and clear fluids
• Eat bland foods like bananas, rice, toast, and applesauce (the BRAT diet)
• Avoid dairy, greasy, and spicy foods until symptoms pass
• Over-the-counter remedies like Loperamide (Imodium) may help, but check with your doctor first

For Nausea

• Take the medication with a small meal or snack — Brexafemme Kit can be taken with or without food
• Try ginger tea or ginger chews
• Avoid strong smells and lying down right after taking the tablets
• Eat small, frequent meals instead of large ones

For Abdominal Pain

• A heating pad on low can soothe stomach cramps
• Try gentle movement like a short walk
• Avoid carbonated drinks and high-fiber foods temporarily

For Dizziness

• Stand up slowly from sitting or lying positions
• Avoid driving or operating machinery if you feel dizzy
• Stay hydrated and rest if needed

When to Call Your Doctor

Contact your healthcare provider if you experience any of the following:

• Severe diarrhea that doesn't improve within 24 hours or includes blood
• Persistent vomiting that prevents you from keeping fluids down
• Signs of an allergic reaction — rash, hives, swelling, difficulty breathing
• Severe abdominal pain that worsens or doesn't resolve
• Signs of dehydration — dark urine, dry mouth, extreme thirst, dizziness
• Symptoms that concern you — trust your instincts and reach out

Call 911 or go to the emergency room if you have difficulty breathing, severe swelling, or signs of anaphylaxis.

Side Effects vs. Yeast Infection Symptoms

It's worth noting that some side effects (like abdominal pain) can overlap with symptoms of the yeast infection itself. If your yeast infection symptoms don't improve within a few days of completing treatment, contact your doctor — you may need a different approach. Your doctor may recommend an alternative from our alternatives guide.

Drug Interactions That May Increase Side Effects

Certain medications can increase the levels of Ibrexafungerp in your body, potentially making side effects more intense. Strong CYP3A4 inhibitors like Ketoconazole, Itraconazole, Clarithromycin, and Ritonavir require a dose reduction. For a full list of interactions, read our drug interactions guide.

Final Thoughts

Most people who take Brexafemme Kit experience mild, temporary side effects — primarily digestive symptoms like diarrhea, nausea, and stomach pain. Since the acute treatment is completed in just one day, these side effects are typically short-lived.

The most important safety concern is the contraindication in pregnancy. Always confirm you are not pregnant before taking Brexafemme Kit, and use effective birth control during treatment.

If you're considering Brexafemme Kit, talk to your doctor about your medical history and current medications. For help finding the medication, visit Medfinder to check pharmacy availability near you.