Thalidomide Sedative: A Short History

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Thalidomide was first licensed in July 1956, intended as sedative, treats many conditions. Initially it was considered safe for pregnant women. Caused significant developmental issues in babies. 1961: withdrawn after a major scandal. Thalidomide was greatly affected drug testing and approval.

Birth defects if taken during pregnancy

  • Can also be transmitted by semen.
  • Defects include amelia, phocomelia, facial palsy.
  • absense of bones, and heart defects.
  • Thromboembolism in combination with other drugs.
  • Temporary or permanent nerve damage.

Side effects similar to other tranquilizers

  • Neurological: Somnolence, fatigue, weakness, mood alteration.
  • Neurological: mild tremors, ataxia, anxiety and confusion.
  • Gastrologic complications: constipation to toxic megacolon.
  • Cardiovascular: hypertension, bradycardia, and peripheral edema.
  • Hematologic: neutropenia, hypochromic anemia, splenomegaly, thrombocytopenia.
  • Used to treat leprosy and cancer.

Hypotheses for the mechanism for teratogenicity

  • Anti-angiogenesis and oxidative stress models.
  • Hypotheses for immunomodularity and anti-inflammatory effects.
  • Modulation of tumor necrosis factor alpha.
  • Suppression of macrophage involvement of prostaglandin synthesis.

References

Ghobrial, I. M., & Rajkumar, S. V. (2003). Management of thalidomide toxicity. The Journal of Supportive Oncology, 1(3), 194-205.

Ito, T., & Handa, H. (2012). Deciphering the mystery of thalidomide teratogenicity. Congenital Anomalies, 52(1), 1-7.

National Center for Biotechnology Information (2021). PubChem Annotation Record for THALIDOMIDE. 

Science Museum (2019). Thalidomide. 

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