Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
|
Potentially causes |
||
|---|---|---|
| False-positive results | False-negative results | |
| Drugs | Acetaminophen Caffeine Fluorouracil Methysergide Naproxen Non-prescription serotonin Diazepam Ephedrine Glycerol guaiacolate Nicotine Phenobarbital |
Acetylsalicylic acid Adrenocorticotropic hormone Levodopa Methyldopa Phenothiazines Ethyl alcohol Imipramine Isoniazid Monoamine oxidase inhibitors Tricyclic antidepressants |
| Foods | Avocado Bananas Eggplant Pineapple Plums Walnuts Plantain Tomato |
|
