Table 2.
Factors potentially affecting the use of 13C-breath tests for the assessment of liver function.
| Increased Total Amount of CO2 Production. |
| Elderly Increased physical activity Consumed meal Sparkling beverage Respiratory diseases Fever |
| Altered liver perfusion |
| Anemia Chronic heart failure Transjugular portosystemic shunt |
| Altered gastrointestinal function |
| Delayed gastric emptying. Altered gastrointestinal absorption. |
| Induction of CYP450 1A2 |
| Chronic cigarette smoking Marijuana Brussel spouts Cabbage Caffeine Carbamezepine Cauliflower Charbroiled foods Clarithromycin Erythromycin Esomeprazole Griseifulvin Insulin Lansoprazole Moricizine Omeprazole Phenobarbital Phenytoin Rifampin Ritonavir |
| Inhibition of CYP450 1A2 |
| Anastrazole Caffeine Cimetidine Ciprofloxacin Enoxacin Fluphenazine Flutamide Fluvoxamine Grapefruit juice Grepafloxacin Isoniazid Lidocaine Lomeflozacin Mexiletine Mibefradil Nelfinavir Norfloxacin Ofloxacin Oral contraceptives Perphenazine Phenacetin Propafenone Ranitidine Rifampin Ropinirole Sparfloxacin Tacrine Ticlopidine Verapamil Zafirlukast |