DOSAGE AND ADMINISTRATION
Procedures for proper handling and disposal of cytotoxic drugs should be considered. Several guidelines on this subject have been published.2-5
To minimize the risk of dermal exposure, always wear impervious gloves when handling bottles containing DROXIA capsules. DROXIA capsules should not be opened.
Personnel should avoid exposure to crushed or opened capsules. If contact with crushed or opened capsules occurs, wash immediately and thoroughly. More information is available in the references listed below.
Dosage should be based on the patient's actual or ideal weight, whichever is less. The initial dose of DROXIA is 15 mg/kg/day as a single dose. The patient's blood count must be monitored every two weeks. (See WARNINGS.)
If blood counts are in an acceptable range*, the dose may be increased by 5 mg/kg/day every 12 weeks until a maximum tolerated dose (the highest dose that does not produce toxic** blood counts over 24 consecutive weeks), or 35 mg/kg/day, is reached.
If blood counts are between the acceptable range* and toxic**, the dose is not increased. If blood counts are considered toxic**, DROXIA should be discontinued until hematologic recovery. Treatment may then be resumed after reducing the dose by 2.5 mg/kg/day from the dose associated with hematologic toxicity. DROXIA may then be titrated up or down, every 12 weeks in 2.5 mg/kg/day increments, until the patient is at a stable dose that does not result in hematologic toxicity for 24 weeks. Any dosage on which a patient develops hematologic toxicity twice should not be tried again.
*acceptable range =
neutrophils ≥ 2500 cells/mm³ ,
platelets ≥ 95,000/mm³ ,
hemoglobin > 5.3 g/dL and
reticulocytes ≥ 95,000/mm³ if the hemoglobin concentration < 9 g/dL.
neutrophils < 2000 cells/mm³ ,
platelets < 80,000/mm³ ,
hemoglobin < 4.5 g/dL and
reticulocytes < 80,000/mm³ if the hemoglobin concentration < 9 g/dL.
Since hydroxyurea may raise the serum uric acid level, dosage adjustment of uricosuric medication may be necessary.
As renal excretion is a pathway of elimination, consideration should be given to decreasing the dosage of DROXIA in patients with renal impairment. The results of a single-dose study of the influence of renal function on the pharmacokinetics of hydroxyurea in adults with sickle cell disease suggest that the initial dose of hydroxyurea should be reduced by 50%, to 7.5 mg/kg/day, when used to treat patients with renal impairment. (See PRECAUTIONS and CLINICAL PHARMACOLOGY.) Close monitoring of hematologic parameters is advised in these patients.
|Creatinine Clearance (mL/min)||Recommended DROXIA Initial Dose (mg/kg daily)|
|< 60 or ESRD*||7.5|
|*On dialysis days, hydroxyurea should be administered to patients with ESRD following hemodialysis.|
There are no data that support specific guidance for dosage adjustment in patients with hepatic impairment. Close monitoring of hematologic parameters is advised in these patients.
DROXIA® (hydroxyurea capsules, USP).
200 mg capsules packaged in HDPE bottles of 60 with a plastic safety screw cap. (NDC 0003-6335-17). The cap and body are opaque blue-green. The capsule is marked in black ink on both the cap and body with “DROXIA” and “6335”.
300 mg capsules packaged in HDPE bottles of 60 with a plastic safety screw cap. (NDC 0003-6336-17). The cap and body are opaque purple. The capsule is marked in black ink on both the cap and body with “DROXIA” and “6336”.
400 mg capsules packaged in HDPE bottles of 60 with a plastic safety screw cap. (NDC 0003-6337-17). The cap and body are opaque reddish-orange. The capsule is marked in black ink on both the cap and body with “DROXIA” and “6337”.
Store at 25°C (77°F); excursions permitted to 15-30°C (59-86°F) [see USP Controlled Room Temperature]. Keep tightly closed.
2. NIOSH Alert: Preventing occupational exposures to antineoplastic and other hazardous drugs in healthcare settings. 2004. U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 2004-165.
3. OSHA Technical Manual, TED 1-0.15A, Section VI: Chapter 2. Controlling Occupational Exposure to Hazardous Drugs. OSHA, 1999. http://www.osha.gov/dts/osta/otm/otm_vi/otm_vi_2.html
4. American Society of Health-System Pharmacists. ASHP guidelines on handling hazardous drugs. Am J Health-Syst Pharm. 2006;63:1172-1193.
5. Polovich M, White JM, Kelleher LO, eds. 2005. Chemotherapy and biotherapy guidelines and recommendations for practice. 2nd ed. Pittsburgh, PA: Oncology Nursing Society.
Manufactured for: Bristol-Myers Squibb Company, Princeton, New Jersey 08543 USA Made in Italy, 1053547A8. Rev January 2012
Last reviewed on RxList: 2/16/2012
This monograph has been modified to include the generic and brand name in many instances.
Additional Droxia Information
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