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What Are the Possible Side Effects of L-Arginine?

While L-Arginine has few side effects that have been reported when taken on a short-term basis, you should always check with your doctor or other health professionals before taking it.

In a few cases, diarrhea and nausea have been reported, while some taking L-Arginine in larger doses have experienced a bitter taste.

If you are currently taking prescription medication, consult with a doctor in order to avoid possible negative interactions.

Those taking cholesterol-lowering medicine or insulin may want to avoid using L-Arginine or use it with care since it may have unpredictable interactions.

Pregnant women should avoid taking L-Arginine, as well as those who are breastfeeding since there is not enough research available on the possible side effects.

However, it can be used safely on a short-term basis, but under the supervision of a doctor.

If you have undergone surgery or are scheduled for surgery, you should not take L-Arginine for at least two weeks before the procedure. Since it causes blood pressure to lower, it may affect the condition of the patient during the procedure.

People with kidney diseases should also avoid L-Arginine since it can increase potassium levels in the body. In certain cases, this can result in an irregular heartbeat that can be potentially life-threatening.

Those who have suffered a recent heart attack should also not take L-Arginine since it may increase the risk of premature death.

In addition, people with low blood pressure should not take the supplement, since it may lower their pressure to dangerous levels.

People with allergies or asthma may be able to take L-Arginine if their doctor agrees to it.

However, it may worsen swelling in the pathways or trigger an allergic response, so use with caution.

People with cirrhosis or herpes should use L-Arginine with care, and under the advice of a doctor, since it may adversely affect their conditions.