Drug lookup
Drug reference

rucaparib

Poly(ADP-ribose) polymerase (PARP) inhibitor · null

START
600 mg PO twice daily
TYPICAL MAX
1200 mg/day
STOP IF
MDS/AML signs, persistent grade 3–4 cytopenia, or hepatotoxicity
WATCH
CBC weekly initially then monthly; LFTs; persistent cytopenia → haematology review
CDSCO approvedATC L01XK03
Dose laddermg/d
300reduced500intermediate600standard
Renal dose adjustmenteGFR mL/min/1.73m²
FULLNo adjustment30CAUTIONNot studied — caution90

KDIGO 2024 + manufacturer label

Pharmacokineticsplasma · t hours
1hONSET2hPEAK18h12hDURATION
ONSET
1h · absorption
PEAK
2h · Tmax
18h ·
DURATION
12h · twice-daily
EXCRETION
Mainly faecal (~71%); ~17% renal
route + CYP
INTERACTIONS
12 major
SEVERE in our sources
PREGNANCY
Can cause fetal harm — avoid; effective contraception during and 6 months after.
FDA category + note
Top interactionssee all 12
  • AdalimumabSevereDatabaseDDInter
  • AmiodaroneSevereDatabaseDDInter
  • AmisulprideSevereDatabaseDDInter
  • AnagrelideSevereDatabaseDDInter

Mechanism

Inhibits PARP-1/2/3 enzymes that participate in single-strand DNA break repair; in BRCA1/2-mutant or homologous-recombination-deficient tumour cells this creates synthetic lethality through unrepaired DNA damage at replication forks.

Indications

Recurrent BRCA-mutant ovarian cancer (maintenance after platinum response)Deleterious BRCA-mutant prostate cancer (mCRPC after androgen-axis therapy)

Dosing

Adult
600 mg PO twice daily; reduce for toxicity (500, 400, 300 mg twice daily).
Pediatric
Not established.
Renal adjustment
No adjustment for CrCl >30; not studied below.
Hepatic adjustment
Mild: no adjustment; moderate–severe: not studied — caution.
Geriatric
No specific adjustment; monitor cytopenias.
Max dose
1200 mg/day (600 mg twice daily)

Pharmacokinetics

Onset
Tumour effect over weeks
Peak effect
~1.9 h (Tmax)
Duration
~12 h (twice-daily)
Half-life
~17–19 h
Bioavailability
~36%
Protein binding
~70%
Metabolism
Hepatic CYP2D6 + CYP1A2/3A (multiple)
Excretion
Mainly faecal (~71%); ~17% renal

Contraindications

  • Severe hypersensitivity
  • Caution: significant haematologic disease, severe hepatic impairment

Side effects

Common
Nausea/vomitingFatigueAnaemiaIncreased creatinineDysgeusiaThrombocytopenia
Serious
  • Myelodysplastic syndrome / acute myeloid leukaemia (boxed-style class concern)
  • Severe myelosuppression
  • Hepatotoxicity
  • Embryo-fetal toxicity

Pregnancy & lactation

Pregnancy

Can cause fetal harm — avoid; effective contraception during and 6 months after.

Lactation

Avoid breastfeeding during and 2 weeks after therapy.

Drug interactions

Adalimumab
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Amiodarone
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Amisulpride
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Anagrelide
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Arsenic Trioxide
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Baricitinib
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Bedaquiline
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Bepridil
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Berotralstat
Severe
Database

Drug interaction classified as: absorption

Source: DDInter

Brexpiprazole
Severe
Database

Drug interaction classified as: metabolism

Source: DDInter

Cabozantinib
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Ceritinib
Severe
Database

Drug interaction classified as: synergy

Source: DDInter

Related guidelines

Ask House about rucaparib

Continue into a citation-backed clinical answer with the drug context already attached.

Sources: Goodman & Gilman 14e·Verified: 2026-05-20 · House clinical team·Cockpit curated: 2026-05-20