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Published on: May 15, 2019
The adverse effects of thalidomide in relapsed and refractory patients of multiple myeloma
1Department of Pharmacology, All India Institute of Medical Sciences, New Delhi. jkgrover@hotmail.com
Abstract:
Thalidomide has shown efficacy in relapsed or refractory patients of multiple myeloma (MM). We present the adverse effect profile of thalidomide in 23 relapsed or refractory MM patients treated with this drug over a period of 15 months. Constipation (100% incidence) and sedation (87%) were the most common adverse effects. Neuropathy had low incidence and was late in onset (>12 months). Tolerance developed to sedation, constipation and skin lesions. All the adverse drug reactions were tolerable and did not warrant decrease or termination of therapy, except for peripheral neuropathy. Contrary to Western reports, peripheral neuropathy in Indian patients developed at a cumulative dose of 200 g or more after 10 months or more of therapy. Therapy was discontinued in one patient due to marked elevation of liver enzyme that was later attributed to acute hepatitis C infection. Only one patient dropped out of the trial for unknown reasons. Overall, thalidomide was found to be a relatively safe drug that can be used over a prolonged period of time.
Insights
Thalidomide is effective for multiple myeloma (MM) patients. Adverse effects like constipation and sedation are common but manageable, with peripheral neuropathy appearing late and rarely in Indian patients.
Area of Science:
- Oncology
- Pharmacology
Background:
- Multiple myeloma (MM) is a hematologic malignancy.
- Relapsed or refractory MM patients often require novel therapeutic strategies.
- Thalidomide has demonstrated efficacy in MM treatment.
Observation:
- A study observed the adverse effect profile of thalidomide in 23 relapsed/refractory MM patients over 15 months.
- Data on incidence, onset, and tolerance of adverse drug reactions were collected.
- Specific attention was paid to peripheral neuropathy and its characteristics in Indian patients.
Findings:
- Constipation (100%) and sedation (87%) were the most frequent adverse effects.
- Peripheral neuropathy was late-onset (>12 months) and had a low incidence.
- Tolerance developed to sedation and constipation; peripheral neuropathy was the main reason for dose reduction or discontinuation.
- Indian patients developed peripheral neuropathy at higher cumulative doses (>200g) and longer duration (>10 months) compared to Western reports.
Implications:
- Thalidomide is a relatively safe and tolerable option for prolonged treatment of relapsed/refractory MM.
- Understanding the specific adverse event profile, particularly peripheral neuropathy, in different ethnic populations is crucial for optimizing MM therapy.
- Further research into managing thalidomide-induced toxicities may enhance its clinical utility.
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