Table 2.
Substance/Activity | Directional Change | Note | Reference |
---|---|---|---|
Fasting | ↑ | 36 h fasted. | [78] |
Fasting | ↑ | 36 h fasted. | [79] |
Grapefruit Juice Grapefruit Juice Ciprofloxacin Growth Hormone |
↔ ↓ ↓ ↑ |
200 mL single and repeat dose (1.2 L). 300 mL repeat dose (1.2 L). 750 mg x 3 doses. Effect is shared with many but not all quinolones. Healthy elderly men. Twelve week use. |
[80] [81] [82,83,84] [85] |
Growth Hormone | ↔ | Growth hormone deficient children. Four week use. Similar results in six month study. | [86,87] |
Herbal Dietary Supplement Heavy/Vigorous Exercise Heavy/Vigorous Exercise Rifampin |
↑ ↑ ↑ ↑ |
2-4 capsules x 3 days. Extracts containing kola nut, grape, green tea and Ginkgo biloba. 8-11 hours daily x 30 days. Single maximal exercise cycle test in young hockey players. 600 mg x 7 days. |
[88] [89,90] [91] [92] |