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FDA Approves Olaparib Tablets for Maintenance Treatment in Ovarian Cancer

With the addition of the new indication, a tablet formulation of olaparib is introduced
18 Aug 2017
Cytotoxic Therapy
Gynaecological Malignancies

On 17 August 2017, the US Food and Drug Administration (FDA) granted regular approval to olaparib tablets (Lynparza, AstraZeneca) for the maintenance treatment of adult patients with recurrent epithelial ovarian, fallopian tube, or primary peritoneal cancer, who are in a complete or partial response to platinum-based chemotherapy.

With the addition of the new indication, a tablet formulation of olaparib is introduced. FDA approved olaparib capsules in 2014 for the treatment of patients with deleterious or suspected deleterious germline BRCA-mutated advanced ovarian cancer who have been treated with three or more prior lines of chemotherapy. On 17 August 2017, the FDA also approved olaparib tablets for this indication. Olaparib tablets and capsules are not interchangeable. Olaparib capsules are being phased out of the US market and will be available only through the Lynparza Specialty Pharmacy Network.

The approval in the maintenance setting was based on two randomised, placebo-controlled, double-blind, multicentre trials in patients with recurrent ovarian cancers who were in response to platinum-based therapy.

SOLO-2 (NCT01874353) randomised 295 patients with recurrent germline BRCA-mutated ovarian, fallopian tube, or primary peritoneal cancer (2:1) to receive olaparib tablets 300 mg orally twice daily or placebo. SOLO-2 demonstrated a statistically significant improvement in investigator-assessed progression-free survival (PFS) in patients randomised to olaparib compared with those who received placebo, with a hazard ratio (HR) of 0.30 (95% CI: 0.22, 0.41; p<0.0001). The estimated median PFS was 19.1 and 5.5 months in the olaparib and placebo arms, respectively. 

Study 19 (NCT00753545) randomised 265 patients regardless of BRCA status (1:1) to receive olaparib capsules 400 mg orally twice daily or placebo. Study 19 demonstrated a statistically significant improvement in investigator-assessed PFS in patients treated with olaparib vs. placebo with a HR of 0.35 (95% CI: 0.25, 0.49; p<0.0001). The estimated median PFS was 8.4 months and 4.8 months in the olaparib and placebo arms, respectively. 

The most common adverse reactions (≥20%) in clinical trials were anaemia, nausea, fatigue (including asthenia), vomiting, nasopharyngitis, diarrhoea, arthralgia/myalgia, dysgeusia, headache, dyspepsia, decreased appetite, constipation, and stomatitis. The most common laboratory abnormalities (≥25%) were decrease in haemoglobin, increase in mean corpuscular volume, decrease in lymphocytes, decrease in leukocytes, decrease in absolute neutrophil count, increase in serum creatinine, and decrease in platelets.

The recommended olaparib tablet dose for both the maintenance therapy and later line treatment setting is 300 mg (two 150 mg tablets) taken orally twice daily with or without food.

Full prescribing information is available here.  

FDA granted this application Fast Track status.

Healthcare professionals should report all serious adverse events suspected to be associated with the use of any medicine and device to FDA’s MedWatch Reporting System.

Last update: 18 Aug 2017

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