№ lp_1_2_38755
Version: 1.0
Review date: May 2026
Adapted from: RDTC shared care protocol version 1.1 (October 2023, updated March 2024)
Replaces: GMMMG Shared Care Protocols for Hydroxycarbamide in adult sickle cell disease and adult myeloproliferative disease (17/8/2017, Version 2.1)
Local approval date: 22.02.2024 (local content added)
CRG approval date: 09.04.2024
GMMMG approval date: 09.05.2024
CEGC approval date: 23.05.2024
Intended users: NHS healthcare professionals
Target population: Adults aged 18 and over with myeloproliferative disorders or sickle cell disease
Licensed indications: Chronic myeloid leukaemia; Essential thrombocythaemia; Polycythaemia vera; Sickle-cell disease
Off-label indications: Primary myelofibrosis; Unclassified myeloproliferative disorders; Psoriasis
Treatment setting: Shared care between specialist and primary care (transfer after ≥12 weeks when stable)
Initiation responsibility: Specialist
Prescribing transfer: Primary care after stabilisation and satisfactory results
Dose range (initial): Essential thrombocythaemia 15 mg/kg daily; Polycythaemia vera 15–20 mg/kg daily; Sickle-cell disease 15 mg/kg daily with 5 mg/kg steps
Maintenance dose range (sickle-cell disease): 15–30 mg/kg daily (max 35 mg/kg)
Dose adjustment considerations: Elderly, renal impairment (CrCl ≤60 mL/min start reduced by 50%), myelotoxicity
Baseline investigations: FBC, U&Es/eGFR or CrCl, LFTs, viral screening, lung disease screening (clinician discretion), vaccination status
Additional sickle-cell baseline: Reticulocyte count
Monitoring frequency (primary care): Every 8–12 weeks (FBC, U&Es, LFTs, reticulocyte count for sickle-cell disease)
Ongoing specialist monitoring: Usually annually; specialist retains responsibility for treatment response and dose changes
Vaccination note: Shingles vaccine eligibility for ages 50–79 (refer to Green Book)
Shared care protocol type: Clinical prescribing and monitoring guideline
Price: 8 / 10 USD
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