Cyclosporine

Also indexed as: Ciclosporin, Ciclosporine, Neoral®, Sandimmune®, Sandimmun®, SangCya™

Cyclosporine is a drug that suppresses the immune system. It is used in combination with other immune suppressive drugs to prevent rejection of transplanted organs by the immune system. There are two different forms of cyclosporine, Sandimmune® and Neoral®. These products differ in important ways and each is used in combination with different additional immunosupressant drugs. Inadequate immune suppression may result in organ rejection and serious complications. People taking cyclosporine should follow their prescribing doctor’s directions exactly and discuss with their doctor any changes in drug therapy, vitamins, supplements, herbal products, or any other substances before making the changes.

Summary of Interactions with Vitamins, Herbs, and Foods
In some cases, a herb or supplement may appear in more than one category, which may seem contradictory. For clarification, read the full article for details about the summarized interactions.

May be Beneficial: Depletion or interference—The medication may deplete or interfere with the absorption or function of the nutrient. Taking these nutrients may help replenish them.	Magnesium Red wine
May be Beneficial: Side effect reduction/prevention—Taking these supplements may help reduce the likelihood and/or severity of a potential side effect caused by the medication.	Ginkgo biloba* Omega-3 fatty acids*
May be Beneficial: Supportive interaction—Taking these supplements may support or otherwise help your medication work better.	Vitamin E*
Avoid: Reduced drug absorption/bioavailability—Avoid these supplements when taking this medication since the supplement may decrease the absorption and/or activity of the medication in the body.	Chinese scullcap St. John’s wort*
Check: Other—Before taking any of these supplements or eating any of these foods with your medication, read this article in full for details.	Apple juice Grapefruit juice Milk Orange juice Quercetin
Adverse interaction	None known

An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.

Interactions with Dietary Supplements

Magnesium
Cyclosporine has been associated with low blood magnesium levels and undesirable side effects.¹ ² ³ Some doctors suggest monitoring the level of magnesium in red blood cells, rather than in serum, as the red blood cell test may be more sensitive for evaluating magnesium status.

Potassium
Cyclosporine can cause excess retention of potassium, potentially leading to dangerous levels of the mineral in the blood (hyperkalemia).⁴ Potassium supplements, potassium-containing salt substitutes (No Salt®, Morton Salt Substitute®, and others), and even high-potassium foods (primarily fruit) should be avoided by people taking cyclosporine, unless directed otherwise by their doctor.

Omega-3 fatty acids
Several studies have shown that in organ transplant patients treated with cyclosporine, addition of 4–6 grams per day of omega-3 fatty acids from fish oil helped reduce high blood pressure,⁵ ⁶ ⁷ though not every study has found fish oil helpful.⁸ It remains unclear to what extent fish oil supplementation will help people with high blood pressure taking cyclosporine following organ transplant.

Vitamin E
Twenty-six liver transplant patients (both adults and children) unable to achieve or maintain therapeutic cyclosporine blood levels during the early post-transplant period were given water-soluble vitamin E in the amount of 6.25 IU/2.2 pounds of body weight two times per day.⁹ Addition of vitamin E in the early post-transplant period reduced the required amount of cyclosporine and the cost of cyclosporine therapy by 26%. These results imply that the addition of vitamin E to established cyclosporine therapy allows for a decrease in the amount of cyclosporine. Combining vitamin E and cyclosporine requires medical supervision to avoid cyclosporine toxicity.

Quercetin
In an animal study, oral administration of quercetin (50 mg per 2.2 pounds of body weight) at the same time as cyclosporine decreased the absorption of cyclosporine by 43%.¹⁰ However, in a study of healthy human volunteers, supplementing with quercetin along with cyclosporine significantly increased blood levels of cyclosporine, when compared with administering cyclosporine alone.¹¹ Because the effect of quercetin supplementation on cyclosporine absorption or utilization appears to be unpredictable, individuals taking cyclosporine should not take quercetin without the supervision of a doctor.

Interactions with Herbs

Chinese scullcap
In a study in rats, oral administration of Chinese scullcap at the same time as cyclosporine significantly reduced the absorption of cyclosporine.¹² Chinese scullcap did not interfere with the availability of cyclosporine when cyclosporine was given intravenously. Because of the potential adverse interaction, people taking cyclosporine should not take Chinese scullcap.

Ginkgo biloba
Ginkgo was reported to protect liver cells from damage caused by cyclosporine in a test tube experiment.¹³ A Ginkgo biloba extract partially reversed cyclosporine-induced reduced kidney function in a study of isolated rat kidneys.¹⁴ Human trials have not studied the actions of ginkgo to prevent or reduce the side effects of cyclosporine.

St. John’s wort (Hypericum perforatum)
Pharmacological research from Europe suggests that St. John’s wort may reduce plasma levels of cyclosporine.¹⁵ Two case reports also describe heart transplant patients taking cyclosporine who showed signs of acute transplant rejection after taking St. John’s wort extract.¹⁶ In both cases, reduced plasma concentrations of cyclosporine were found. One report cites similar findings in three patients taking cyclosporine and St. John’s wort together.¹⁷ Finally, similar drops in cyclosporine blood levels were reported in 45 kidney or liver transplant patients who began taking St. John’s wort.¹⁸ Until more is known, people taking cyclosporine should avoid the use of St. John’s wort.

Interactions with Foods and Other Compounds

Food
Food increases the absorption of cyclosporine.¹⁹ A change in the timing of food and cyclosporine dosing may alter cyclosporine blood levels, requiring dose adjustment.

Grapefruit juice
In a randomised study of nine adults with cyclosporine-treated auto-immune diseases, grapefruit juice (5 ounces two times per day with cyclosporine, for ten days) caused a significant increase in cyclosporine blood levels compared with cyclosporine with water.²⁰ The rise in cyclosporine blood levels was associated with abdominal pain, lightheadedness, nausea, and tremor in one patient. Using grapefruit juice to reduce the amount of cyclosporine needed has not been sufficiently studied and cannot therefore be counted on to produce a predictable change in cyclosporine requirements. The same effects might be seen from eating grapefruit as from drinking its juice.

Red wine
Ingestion of red wine along with cyclosporine has been found to reduce blood levels of the drug.²¹ Individuals taking cyclosporine should, therefore, not consume red wine at the same time as they take the drug. It is not known whether red wine consumed at a different time of the day would affect the availability of cyclosporine. Until more is known, it seems prudent for people taking cyclosporine to avoid red wine altogether.

Milk, Apple juice, and Orange juice
Mixing Sandimmune® solution with room-temperature milk, chocolate milk, orange juice, or apple juice may improve its flavour.²²

Mixing Neoral® solution with room temperature orange or apple juice may improve its flavour, but combining it with milk makes an unpalatable mix.²³

References
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1. June CH, Thompson CB, Kennedy MS, et al. Profound hypomagnesemia and renal magnesium wasting associated with the use of cyclosporine for marrow transplantation. Transplantation 1985;39:620–4.

2. Thompson CB, June CH, Sullivan KM, Thomas ED. Association between cyclosporine neurotoxicity and hypomagnesemia. Lancet 1984;ii:1116–20.

3. June CH, Thompson CB, Kennedy MS, et al. Correlation of hypomagnesemia with the onset of cyclosporine-associated hypertension in marrow transplant patients. Transplantation 1986;41:47–51.

4. Perazella MA. Drug-induced hyperkalemia: Old culprits and new offenders. Am J Med 2000;109:307–14 [review].

5. Ventura HO, Milani RV, Lavie CJ, et al. Cyclosporine-induced hypertension. Efficacy of omega-3 fatty acids in patients after cardiac transplantation. Circulation 1993;88(5 Pt 2):II281–5.

6. Andreassen AK, Harmann A, Offstad J, et al. Hypertension prophylaxis with omega-3 fatty acids in heart transplant recipients. J Am Coll Cardiol 1997;29:1324–31.

7. Homan van der Heide JJ, Bilo HJ, Tegzess AM, Donker AJ. The effects of dietary supplementation with fish oil on renal function in cyclosporine-treated renal transplant recipients. Transplantation 1990;49:523–7.

8. Kooijmans-Coutinho MF, Rischen-Vos J, Hermans J, et al. Dietary fish oil in renal transplant recipients treated with cyclosporine-A: No beneficial effects shown. J Am Soc Nephrol 1996;7:513–8.

9. Pan SH, Lopez RR Jr, Sher LS, et al. Enhanced oral cyclosporine absorption with water-soluble vitamin E early after liver transplantation. Pharmacotherapy 1996;16:59–65.

10. Hsiu SL, Hou YC, Wang YH, et al. Quercetin significantly decreased cyclosporin oral bioavailability in pigs and rats. Life Sci 2002;72:227–35.

11. Choi JS, Choi BC, Choi KE. Effect of quercetin on the pharmacokinetics of oral cyclosporine. Am J Health Syst Pharm 2004;61:2406–9.

12. Lai MY, Hsiu SL, Hou YC, et al. Significant decrease of cyclosporine bioavailability in rats caused by a decoction of the roots of Scutellaria baicalensis. Planta Med 2004;70:132–7.

13. Barth SA, Inselmann G, Engemann R, Heidemann HT. Influences of Ginkgo biloba on cyclosporine A included lipid peroxidation in human liver microsomes in comparison to vitamin E, glutathione and N-acetylcysteine. Biochem Pharmacol 1991;41:1521–6.

14. Bagnis C, Deray G, Dubois M, et al. Prevention of cyclosporine nephrotoxicity with a platelet-activating factor (PAF) antagonist. Nephrol Dial Transplant 1996;11:507–13.

15. Mai I, Schmider J, et al. Unpublished results, May, 1999. Reported in: Johne A, Brockmöller, Bauer S, et al. Pharmacokinetic interaction of digoxin with an herbal extract from St. John’s wort (Hypericum perforatum). Clin Pharmacol Ther 1999;66:338–45.

16. Rauschitzka F, Meir P, Turina M, et al. Acute transplant rejection due to Saint John’s wort. Lancet 2000;355:548–9 [letter].

17. Ernst E. Second thoughts about safety of St. John’s wort. Lancet 1999;354:2014–6 [letter].

18. Breidenbach T, Hoffmann MW, Becker T, et al. Drug interaction of St. John’s wort with ciclopsorin. Lancet 2000;355:1912 [letter].

19. Holt GA. Food & Drug Interactions. Chicago: Precept Press, 1998, 87.

20. Ioannides-Demos LL, Christophidis N, Ryan P, et al. Dosing implication of a clinical interaction between grapefruit juice and cyclosporine and metabolite concentrations in patients with autoimmune diseases. J Rheumatol 1997;24:49–54.

21. Tsunoda SM, Harris RZ, Christians U, et al. Red wine decreases cyclosporine bioavailability. Clin Pharmacol Ther 2001;70:462–7.

22. Threlkeld DS, ed. Miscellaneous Products, Immunosuppressive Drugs, Cyclosporine. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, Apr 1998, 738a–8k.

23. Threlkeld DS, ed. Miscellaneous Products, Immunosuppressive Drugs, Cyclosporine. In Facts and Comparisons Drug Information. St. Louis, MO: Facts and Comparisons, Apr 1998, 738a–8k.

Please read the disclaimer about the limitations of the information provided here. Do NOT rely solely on the information in this article.

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The information presented in Healthnotes is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or chemist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires March 2007.

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