Not all uses for alpha-lipoic acid have been approved by the FDA. Alpha-lipoic acid should not be substituted for medications prescribed for you by your doctor.
Alpha-lipoic acid is often sold as an herbal supplement. There are no regulated manufacturing standards in place for many herbal compounds and some marketed supplements have been found to be contaminated with toxic metals or other drugs. Herbal/health supplements should be purchased from a reliable source to minimize the risk of contamination.
Talk with a doctor, pharmacist, herbalist, or other healthcare provider before using alpha-lipoic acid if you have kidney or liver disease, diabetes, low blood sugar (hypoglycemia), or a thyroid disorder.
Use alpha-lipoic acid as directed on the label, or as your healthcare provider has prescribed. Do not use this product in larger amounts or for longer than recommended.
Taking alpha-lipoic acid may lower your blood sugar. Tell your doctor, pharmacist, herbalist, or other healthcare provider if you have symptoms such as hunger, weakness, nausea, irritability, dizziness, headache, blurred vision, confusion, sweating, fast heart rate, or fainting.
Less serious side effects are more likely to occur, and you may have none at all. Tell your healthcare provider about any unusual or bothersome side effect.