Vitamin B3 (Niacin)   Uses of this Supplement Alcoholism Anxiety Depression Diabetes Mellitus Hypercholesterolemia Hypoglycemia Insomnia Osteoarthritis Rheumatoid Arthritis   Supplements with Similar Uses View List by Use   Drugs that Interact Summary Aspirin Aspirin-containing Medications Biguanide Antidiabetic Agents Bile Acid Sequestrants HMG-CoA Reductase Inhibitors Insulin Preparations Neomycin Neomycin-containing Medications Nicotine Sulfonylureas Tetracycline Tetracycline-containing Medications   Supplements with Similar Side Effects View List by Side Effect   Supplements with Similar Warnings View List by Warning   Learn More About Nutrition	Look Up > Supplements > Vitamin B3 (Niacin) > Warnings Supplements with Similar Warnings as Vitamin B3 (Niacin) Below is a list of conditions where patients are warned against taking this supplement. Under each condition is listed other supplements with similar warnings.   asthma Bromelain diabetes Alpha-Lipoic Acid Glucosamine Psyllium glucose levels (close monitoring) Ethylenediaminetetraacetic Acid (EDTA) toxicity Chromium Copper Manganese Selenium Vitamin A (Retinol) Vitamin B6 (Pyridoxine) Vitamin E