Side Effects and Interactions
L-arginine side effects should I watch out for?
L-arginine is an amino acid found in foods such as red meat. It is used
by the body to build protein structures. As it is found in nature, side
effects are not expected to be significant.
used as a supplement, higher doses are usually taken than would be
found from just eating meat alone. The side effects listed below have been
seen in research studies. The side effects reported by volunteers in the studies are generally mild.
Effects, Toxicity and Warnings
Common side effects include: diarrhea, stomach pain and bloating,
nausea, vomiting and lowered blood pressure (leading to dizziness and
Allergic response is uncommon but it could cause asthma
attack, skin rash or swelling.
Safety - When used in research studies for up to 3 months for
treating poor circulation and erectile dysfunction, L-arginine was
shown to be safe.
Pregnancy & Lactation -
It is probably safe to use during pregnancy in appropriate doses. There
is no information on using L-arginine during lactation.To avoid L-arginine side effects, always start with the lowest suggested dose and then increase gradually over several days or weeks.
Drug & Health Condition
Myocardial Infarction (MI) / Heart Attack
L-arginine after a patient has suffered a heart attack showed no benefit.
advised that patients who had a
recent heart attack to
avoid taking this supplement. One study showed that subjects taking 3
grams of L-arginine daily for 6 months cause 6 patients (8.6%) to die
compared to patients not taking L-arginine supplement.
High blood pressure medications
- theoretical / caution
L-arginine can lower blood pressure, combining it with prescription
blood pressure medication can cause further drop in blood pressure.
blood pressure when you start or stop
this supplement. If
you are currently on prescription medication for controlling blood
pressure, you may need to reduce your dosage. Consult your healthcare
Viagra (sildenafil) / Levitra (vardenafil)
- theoretical / caution
L-arginine and Viagra (sildenafil) can both lower blood pressure,
combining the two may cause additional drop in blood pressure.
your blood pressure closing when you are starting or stopping this
medication while on Viagra or Levitra. This will ensure you find out
how your body respond to this supplement.
Cancer - theoretical / caution
research suggest that L-arginine helps in some forms of cancer, other
research showed that nitric oxide (made from L-arginine) can speed up the
growth or the spread of cancer cells.
More studies in
humans will be
needed before we can get accurate results.
Dementia / Alzheimer's Disease (AD)
research reported that the brains of patients
with Alzheimer's disease (AD) contain higher levels of L-arginine. Also the
formation of NO has been suggested to contribute to the condition
leading to AD.
We don't know
whether AD causes
an increase in L-arginine in the brain or that high levels of L-arginine causes
Herpes Virus Infection / Cold Sores
L-arginine might be
needed for the virus to multiple. Avoid taking this amino acid when the herpes virus are actively multiplying.
of L Arginine and Discussions on Research Studies Done
results from some of the research studies done on benefits of L-arginine
for treating various health conditions...
Dosage to Use
information on L-Arginine
to use for treating various health conditions in this detail article...
Articles and Resources on L-Arginine Side Effects
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