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What can affect sedimentation rate test results?

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Some conditions and medicines can affect the speed at which red blood cells fall -- and they may affect your test results. These include:

  • Anemia
  • Older age
  • Kidney problems
  • Thyroid disease
  • Pregnancy or having your period
  • Obesity
  • Cancers such as multiple myeloma
  • Infections
  • Drugs like birth control pills, methyldopa (Aldomet), theophylline (Theo-24, Theolair, Elixophylline), vitamin A, cortisone, and quinine

SOURCES:

American Association for Clinical Chemistry: "ESR."

Mayo Clinic: "Sed rate (erythrocyte sedimentation rate): How you prepare," "Overview," "Results," "Why it's done."

National Heart, Lung, and Blood Institute: "What to Expect With Blood Tests."

Nemours Foundation: "Blood Test: Erythrocyte Sedimentation Rate (ESR)."

University of Rochester Medical Center: "Erythrocyte Sedimentation Rate."

Reviewed by Sabrina Felson on February 19, 2019

SOURCES:

American Association for Clinical Chemistry: "ESR."

Mayo Clinic: "Sed rate (erythrocyte sedimentation rate): How you prepare," "Overview," "Results," "Why it's done."

National Heart, Lung, and Blood Institute: "What to Expect With Blood Tests."

Nemours Foundation: "Blood Test: Erythrocyte Sedimentation Rate (ESR)."

University of Rochester Medical Center: "Erythrocyte Sedimentation Rate."

Reviewed by Sabrina Felson on February 19, 2019

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What other tests might I need in addition to a sedimentation rate test?

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