Fentanyl is used in surgery as a general anesthetic and is available in a patch form to treat severe, chronic pain. It is in a class of drugs known as opioid analgesics.
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One double-blind study showed that giving magnesium intravenously before surgery dramatically reduced the amount of fentanyl needed to control pain during and after an operation.1 Further research is needed to determine whether people using fentanyl patches might benefit from supplementing with oral magnesium.
Drinking grapefruit juice, orange juice, or apple juice with fexofenadine decreases blood levels of the drug.2 , 3
Drinking grapefruit juice, orange juice, or apple juice with fexofenadine decreases blood levels of the drug.4 , 5
Drinking grapefruit juice, orange juice, or apple juice with fexofenadine decreases blood levels of the drug.6 , 7
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1. Koinig H, Wallner T, Marhofer P, et al. Magnesium sulfate reduces intra- and postoperative analgesic requirements. Anesth Analg 1998;87:206–10.
2. Dresser GK, Bailey DG, Leake BF, et al. Fruit juices inhibit organic anion transporting polypeptide-mediated drug uptake to decrease the oral availability of fexofenadine. Clin Pharmacol Ther 2002;71:11–20.
3. Dresser GK, Kim RB, Bailey DG. Effect of grapefruit juice volume on the reduction of fexofenadine bioavailability: possible role of organic anion transporting polypeptides. Clin Pharmacol Ther2005;77:170–7.
4. Dresser GK, Bailey DG, Leake BF, et al. Fruit juices inhibit organic anion transporting polypeptide-mediated drug uptake to decrease the oral availability of fexofenadine. Clin Pharmacol Ther 2002;71:11–20.
5. Dresser GK, Kim RB, Bailey DG. Effect of grapefruit juice volume on the reduction of fexofenadine bioavailability: possible role of organic anion transporting polypeptides. Clin Pharmacol Ther2005;77:170–7.
6. Dresser GK, Bailey DG, Leake BF, et al. Fruit juices inhibit organic anion transporting polypeptide-mediated drug uptake to decrease the oral availability of fexofenadine. Clin Pharmacol Ther 2002;71:11–20.
7. Dresser GK, Kim RB, Bailey DG. Effect of grapefruit juice volume on the reduction of fexofenadine bioavailability: possible role of organic anion transporting polypeptides. Clin Pharmacol Ther2005;77:170–7.
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