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Multi-kinase inhibitor Pregnancy: Can cause fetal harm when administered to a pregnant woman, based on animal studies and its mechanism of action; embryolethal and teratogenic in rats and rabbits at exposures lower than human exposures at the recommended dose. There are no available data in pregnant women. Advise pregnant women of the potential hazard to a fetus and advise effective contraception during treatment (the post-treatment contraception duration was truncated in the fetched label text).

Regorafenib (Specialist drug)

Brand names: Stivarga

Regorafenib is an oral multikinase inhibitor used as a specialist treatment in metastatic colorectal cancer, gastrointestinal stromal tumour and hepatocellular carcinoma.

Auto-extracted from the source labelling — not yet independently clinician-verified. These values were distilled from the UK SPC (or the US label where noted) but have not had a clinician sign-off. Confirm against the current SmPC before prescribing.

Adult dose

Dose: 160 mg (four 40 mg tablets)
Route: Oral — swallow tablets whole with water after a low-fat meal containing less than 600 calories and less than 30% fat
Frequency: Once daily for the first 21 days of each 28-day cycle, at the same time each day; continue until disease progression or unacceptable toxicity
Max: 160 mg once daily is the recommended dose; the label does not state a separate maximum. Lowest recommended daily dose after reduction is 80 mg daily.
Do not take two doses on the same day to make up for a missed dose from the previous day. Dose modifications: reduce in 40 mg (one tablet) increments; the lowest recommended daily dose is 80 mg daily. Reduce to 120 mg for the first occurrence of Grade 2 hand-foot skin reaction (HFSR/palmar-plantar erythrodysaesthesia) of any duration, after recovery of any Grade 3 or 4 adverse reaction except infection, and for Grade 3 AST/ALT elevation (only resume if the potential benefit outweighs the risk of hepatotoxicity). Reduce to 80 mg for re-occurrence of Grade 2 HFSR at the 120 mg dose and after recovery of any Grade 3 or 4 adverse reaction at the 120 mg dose (except hepatotoxicity or infection). Interrupt for recurrent Grade 2 HFSR not improving within 7 days despite dose reduction (minimum 7 days interruption for Grade 3 HFSR), symptomatic Grade 2 hypertension, any Grade 3 or 4 adverse reaction, or worsening infection of any grade. Permanently discontinue for failure to tolerate 80 mg, AST or ALT >20 x ULN, AST or ALT >3 x ULN with concurrent bilirubin >2 x ULN, re-occurrence of AST or ALT >5 x ULN despite reduction to 120 mg, or any Grade 4 adverse reaction (only resume if the potential benefit outweighs the risks). Withhold for at least 2 weeks prior to elective surgery and do not administer for at least 2 weeks after major surgery and until adequate wound healing. Paediatric: safety and efficacy in patients less than 18 years of age have not been established. CLINICIAN CHECK: this draft is from the US FDA prescribing information (STIVARGA, Bayer HealthCare Pharmaceuticals, label date 2026-02-09) — no UK SPC posology was fetched; verify against the UK SPC.

Dose auto-extracted from US FDA prescribing information (openFDA / DailyMed) — cross-check; US labelling may differ from UK — not yet clinician-verified. Always confirm against the product SmPC and your local formulary before prescribing.

Contraindications

  • None — section 4 of the US label states 'None'

Side effects

  • Hand-foot skin reaction (palmar-plantar erythrodysaesthesia)
  • Asthenia/fatigue
  • Diarrhoea
  • Hypertension
  • Pain (including gastrointestinal and abdominal pain), decreased appetite/food intake, infection, dysphonia, hyperbilirubinaemia, fever, mucositis, weight loss, rash and nausea (all >= 20%)
  • Serious: hepatotoxicity, haemorrhage, gastrointestinal perforation or fistula, cardiac ischaemia and infarction, reversible posterior leukoencephalopathy syndrome

Interactions

  • Strong CYP3A4 inducers (e.g. rifampin, phenytoin, carbamazepine, phenobarbital, St John's Wort) — avoid; they decrease regorafenib plasma concentrations and may lead to decreased efficacy
  • Strong CYP3A4 inhibitors (e.g. clarithromycin, grapefruit juice, itraconazole, ketoconazole, nefazodone, posaconazole, telithromycin, voriconazole) — avoid; they increase regorafenib plasma concentrations and may lead to increased toxicity
  • BCRP substrates — monitor patients closely for symptoms of increased exposure to the BCRP substrate

Clinical monograph

How it works

It inhibits multiple kinases involved in tumour angiogenesis, oncogenesis and the tumour microenvironment, including VEGFR, KIT and RAF kinases.

Prescribing in practice

  • Severe and sometimes fatal hepatotoxicity can occur, so liver function must be checked before and frequently during the early weeks of treatment.
  • Hand-foot skin reaction and hypertension are common and may require dose modification.
  • Initiation is restricted to specialist oncology services familiar with multikinase inhibitor toxicity.

Monitoring

Monitor liver function tests, blood pressure and the skin (particularly palms and soles) regularly, especially early in treatment.

Counselling the patient

  • Report yellowing of the skin or eyes, dark urine or unusual tiredness promptly.
  • Tell the team about painful, blistering or peeling skin on the hands or feet.
  • Attend for regular blood pressure and blood test checks.

Evidence & guidelines

Use is supported by NICE guidance and pivotal trials including the CORRECT study in colorectal cancer.

Reference: NICE TA866/TA678; SmPC; 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.