The adverse effects of thalidomide in relapsed and refractory patients of multiple myeloma

J K Grover1, G Uppal, V Raina

  • 1Department of Pharmacology, All India Institute of Medical Sciences, New Delhi. jkgrover@hotmail.com

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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