Side Effects of Furosemide

Headaches, anemia, and vertigo are some of the possible side effects of furosemide. Side effects of this drug are generally minor and can usually be treated by you or your healthcare provider. However, if you experience any serious furosemide side effects, such as unexplained swelling, a rash, or ringing in the ears, contact your healthcare provider immediately.

 

An Overview of Side Effects of Furosemide

As with any medicine, side effects can occur with furosemide (Lasix®). However, not everyone who takes the medication will experience side effects. In fact, most people tolerate it well. If furosemide side effects do occur, in most cases, they are minor and either require no treatment or can be easily treated by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with furosemide. Your healthcare provider can discuss a more complete list of furosemide side effects with you.)
 

Furosemide Side Effects to Report

Some side effects with furosemide are potentially serious and should be reported immediately to your healthcare provider.
 These include but are not limited to:
 
  • Dizziness, lightheadedness, or fainting spells
  • Signs of dehydration or low electrolytes, such as:
 
    • Dry mouth
    • Thirst
    • Weakness
    • Lethargy
    • Drowsiness
    • Restlessness
    • Muscle pain or muscle cramps
    • Low blood pressure (hypotension)
    • Decreased urination
    • A rapid heart rate (tachycardia) or irregular heart rhythm (arrhythmia)
    • Nausea or vomiting
 
  • Yellowing of the skin or the whites of the eyes (jaundice)
  • Ringing in the ears (tinnitus) or hearing problems
  • High blood sugar (hyperglycemia)
  • Signs of an allergic reaction, including:
 
    • An unexplained rash
    • Hives
    • Itching
    • Unexplained swelling
    • Wheezing
    • Difficulty breathing or swallowing.
 
(Side Effects of Furosemide Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;