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L-Arginine Side Effects

Serious Side Effects of L-Arginine

There are a number of side effects with L-arginine (when taken orally) that you should report to your healthcare provider and which might indicate that you should stop taking it. These include but are not limited to:
  • Breathing problems, including a worsening of asthma
  • Signs of an allergic reaction, including:
    • An unexplained rash
    • Hives
    • Itching
    • Unexplained swelling
    • Wheezing
    • Difficulty breathing or swallowing.
Taking L-arginine intravenously can cause additional serious problems, such as:
  • Swelling around the eyes
  • Extreme irritation of the veins and surrounding tissues, possibly resulting in severe damage.
Theoretically, L-arginine may also cause low blood pressure (hypotension).

Final Thoughts

If you think that you are experiencing an L-arginine side effect, let your healthcare provider know. Also, let your healthcare provider know if you develop something that "just does not seem right." While it may not be related to L-arginine, your healthcare provider will be able to diagnose and treat the problem.
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