Midostaurin
Brand names: Rydapt
Midostaurin is an oral multi-targeted protein kinase inhibitor used in FLT3-mutated acute myeloid leukaemia (with chemotherapy) and in advanced systemic mastocytosis and related mast cell neoplasms.
Adult dose
Dose independently re-sourced from UK Summary of Product Characteristics (SPC) via the eMC — clinician-reviewed. Always confirm against the product SmPC and your local formulary before prescribing.
Contraindications
- Hypersensitivity to midostaurin or to any of the excipients
- Concomitant administration of potent CYP3A4 inducers, e.g. rifampicin, St John's Wort (Hypericum perforatum), carbamazepine, enzalutamide, phenytoin
Side effects
- Febrile neutropenia (83.4% in the AML study) - also the most frequent serious adverse reaction
- Nausea (83.4%) and vomiting (60.7%)
- Exfoliative dermatitis (61.6%) - the most frequent Grade 3/4 reaction leading to discontinuation
- Headache (45.9%)
- Petechiae (35.8%) and pyrexia (34.5%)
- Lymphopenia and device-related infection (frequent Grade 3/4 reactions)
- Hyperglycaemia
- QT prolongation (more frequent than placebo during the maintenance phase)
- Laboratory abnormalities: decreased haemoglobin, decreased absolute neutrophil count, increased ALT and AST, hypokalaemia
- Neutropenia and infections, including severe neutropenia (ANC <0.5 x 10^9/l)
- Cardiac dysfunction including congestive heart failure (some fatal) and transient decreases in left ventricular ejection fraction, reported in the ASM/SM-AHN/MCL studies
- Interstitial lung disease and pneumonitis, in some cases fatal
Monitoring
- Monitor white blood cell counts regularly, especially at treatment initiation; interrupt treatment for unexplained severe neutropenia until ANC is >=1.0 x 10^9/l, and discontinue for recurrent or prolonged severe neutropenia suspected to be treatment-related
- Control any active serious infection before starting monotherapy, and monitor for signs and symptoms of infection including device-related infection
- Assess left ventricular ejection fraction when clinically indicated (at baseline and during treatment) in patients at risk of cardiac dysfunction
- Consider interval assessments of QT by ECG if given concurrently with medicinal products that can prolong the QT interval; caution in patients at risk of QTc prolongation (e.g. concomitant medicines and/or electrolyte disturbances)
- Monitor for pulmonary symptoms indicative of interstitial lung disease or pneumonitis and discontinue if these are >=Grade 3 without an infectious aetiology
- Pregnancy test within 7 days prior to starting treatment in sexually active women of childbearing potential
Clinical monograph
How it works
It inhibits multiple tyrosine kinases including mutant and wild-type FLT3 and KIT, blocking downstream proliferative signalling in leukaemic and neoplastic mast cells.
Prescribing in practice
- It can prolong the QT interval, so correct electrolytes and review concomitant QT-prolonging and interacting drugs before and during treatment.
- It is a CYP3A4 substrate, so strong inducers or inhibitors can markedly alter exposure and should be managed carefully.
- Nausea and vomiting are common, and it is taken with food to improve tolerability.
Monitoring
Monitor the full blood count, ECG including QT interval, and for pulmonary symptoms during treatment.
Counselling the patient
- Take the capsules with food to reduce nausea.
- Tell your team about all other medicines, as some interact significantly.
- Effective contraception is required during treatment.
Evidence & guidelines
Benefit in FLT3-mutated AML was shown in the RATIFY trial, supporting its use with intensive chemotherapy.
Reference: RATIFY Trial (Stone et al. NEJM 2017); NICE TA523; SPC Rydapt; Drug verified in RxNorm (NLM); confirm dosing against the manufacturer SPC (eMC). Verify against your local formulary and current prescribing references before prescribing. The structured dose values shown have been reviewed by a clinician. Monograph status: clinician-reviewed (2026-07-04).
Related
Curated clinical cross-links plus same-class fallbacks.
- SMART2 Risk Score for Recurrent Vascular Events · Cardiovascular Risk
- PCSK9 Inhibitor Eligibility (NICE TA393 / TA394) · Lipid Management
- Immune-Related Adverse Events (irAE) -- GI Toxicity Colitis Grading · Oncology-Related GI
- irAE Hepatitis Grading (CTCAE) · Immunotherapy
- DIPSS — Dynamic International Prognostic Scoring System for Myelofibrosis · Cancer Prognosis
- BALL Score for Relapsed/Refractory CLL · Leukaemia
- Major Haemorrhage / Massive Transfusion · BCSH; RCOA; RCEM; RCS — BCSH Guidelines
- Anaemia Investigation · BSH / NICE
- Splenomegaly Workup · BSH; BMJ Best Practice
- Deep Vein Thrombosis Diagnosis and Treatment · NICE CG144 / NICE NG158
- Sickle Cell Crisis · BSH 2021 / BCSH
- Neutropenic Sepsis · NICE CG151 2012 / ESMO