Initial US Approval:
2025
Key Clinical Studies:
TROPION-Breast01 (NCT05104866)
Drug Class/Description:
Trop-2-directed antibody and topoisomerase inhibitor conjugate
Indications and Usage:
- Treatment of adult patients with unresectable or metastatic, hormone receptor (HR)-positive, human epidermal growth factor receptor 2 (HER2)-negative (IHC 0, IHC 1+ or IHC 2+/ISH-) breast cancer who have received prior endocrine-based therapy and chemotherapy for unresectable or metastatic disease.
Dosage Administration:
- For intravenous infusion only. Do not administer as an intravenous push or bolus. DO NOT use Sodium Chloride Injection, USP.
- Premedicate for prevention of infusion reactions and nausea and vomiting.
- The recommended dosage of DATROWAY is 6 mg/kg given as an intravenous infusion once every 3 weeks (21-day cycle) until disease progression or unacceptable toxicity.
Dosage Forms and Strengths:
For injection: 100 mg lyophilized powder in a single-dose vial.
Contraindications:
None.
Warnings and Precautions:
- Interstitial Lung Disease (ILD) and Pneumonitis: DATROWAY can cause severe and fatal cases of ILD/pneumonitis. Monitor for new or worsening signs and symptoms of ILD/pneumonitis. If ILD/pneumonitis is suspected, withhold DATROWAY and initiate corticosteroids. Permanently discontinue DATROWAY in patients with confirmed Grade 2 or higher ILD/pneumonitis.
- Ocular Adverse Reactions: DATROWAY can cause ocular adverse reactions including dry eye, keratitis, blepharitis and meibomian gland dysfunction, increased lacrimation, conjunctivitis, and blurred vision. Monitor patients for ocular adverse reactions during treatment with DATROWAY. Advise patients to use preservativefree lubricating eye drops and to avoid using contact lenses during treatment with DATROWAY. Dose delay, dose reduce, or permanently discontinue DATROWAY based on the severity of ocular adverse reactions. Refer patients to an eye care professional for any new or worsening ocular signs and symptoms.
- Stomatitis/Oral Mucositis: DATROWAY can cause stomatitis, including mouth ulcers and oral mucositis. Advise patients to use a steroid-containing mouthwash when starting treatment and to hold ice chips or ice water in mouth during the infusion of DATROWAY. Based on the severity of the adverse reaction, withhold, dose reduce, or permanently discontinue DATROWAY.
- Embryo-Fetal Toxicity: DATROWAY can cause fetal harm. Advise patients of potential risk to a fetus and to use effective contraception.
Adverse Reactions:
The most common adverse reactions (≥20%), including laboratory abnormalities, were stomatitis, nausea, fatigue, decreased leukocytes, decreased calcium, alopecia, decreased lymphocytes, decreased hemoglobin, constipation, decreased neutrophils, dry eye, vomiting, increased ALT, keratitis, increased AST, and increased alkaline phosphatase.
Use in Specific Populations:
- Lactation: Advise not to breastfeed.
- Infertility: May impair fertility in males and females.
Adapted from:
https://www.accessdata.fda.gov/drugsatfda_docs/label/2025/761394s000lbl.pdf
Every health-care provider should make their own determination regarding specific safe and appropriate patient care practices, including drug dosages and indications. The provider should always consult the most recent prescribing/product information. FDA Focus information is not guaranteed to be accurate, complete, or current. JADPRO and its editors, authors, reviewers, and commentators cannot be held responsible for any liability incurred as a consequence of the application of any of the information listed within.
