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Drug Interactions between cyclosporine and Diar-Aid

This report displays the potential drug interactions for the following 2 drugs:

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Interactions between your drugs

Major

cycloSPORINE loperamide

Applies to: cyclosporine and Diar-Aid (loperamide)

MONITOR CLOSELY: Coadministration with drugs that inhibit the P-glycoprotein (P-gp) efflux transporter may increase the concentrations of loperamide in plasma and central nervous system (CNS). Inhibition of P-gp in the intestine increases the systemic absorption of loperamide, while inhibition in the blood brain barrier facilitates loperamide entry into the CNS. Opioid and other adverse effects may be enhanced. For example, when 16 mg of loperamide was administered to 8 healthy subjects with 600 mg of quinidine, a potent P-gp inhibitor, mean loperamide systemic exposure (AUC) increased by 2.5 fold and respiratory response to carbon dioxide decreased. High plasma levels of loperamide, including through abuse or misuse, has been associated with serious and potentially fatal cardiac adverse events such as syncope, cardiac arrest, and arrhythmia related to prolongation of the QT interval. According to the FDA, the agency received reports of 48 cases of serious heart problems associated with use of loperamide from when it was first approved in 1976 through 2015. Thirty-one of these cases resulted in hospitalizations, and 10 patients died. The serious heart problems occurred mostly in patients who were using loperamide dosages that were much higher than recommended in an attempt to achieve euphoria, prevent opioid withdrawal, or treat diarrhea. In the most severe cases, individuals self-treated with dosages ranging from 70 to 1600 mg/day, or 4 to 100 times the recommended dosage. In other cases, patients were taking the recommended dosage, but with concomitant interacting drugs that caused an increase in loperamide levels. There have been additional cases of serious heart problems associated with loperamide use reported in the medical literature.

MANAGEMENT: Caution is recommended if loperamide is used with potent P-gp inhibitors. Particular caution is advised when drugs that inhibit other pathways of loperamide elimination (CYP450 2C8; CYP450 3A4) are also used, since they may act synergistically with P-gp inhibitors to increase loperamide concentrations. Patients should be counseled to not exceed the recommended dosage and frequency or duration of use of loperamide, and to seek prompt medical attention if they experience symptoms that could indicate the occurrence of torsade de pointes such as dizziness, lightheadedness, fainting, palpitation, irregular heart rhythm, shortness of breath, or syncope. If loperamide-induced cardiotoxicity is suspected, promptly discontinue loperamide and initiate therapy to manage and prevent cardiac arrhythmias and adverse outcomes. Electrical pacing or cardioversion may be necessary if torsade de pointes persists despite pharmacotherapy. In many of the reported cases of loperamide-induced cardiotoxicity, standard antiarrhythmic drugs were ineffective, and electrical pacing or cardioversion was necessary.

References

  1. Crowe A, Wong P "Potential roles of P-gp and calcium channels in loperamide and diphenoxylate transport." Toxicol Appl Pharmacol 193 (2003): 127-37
  2. Sadeque AJ, Wandel C, He H, Shah S, Wood AJ "Increased drug delivery to the brain by P-glycoprotein inhibition." Clin Pharmacol Ther 68 (2000): 231-7
  3. Adachi Y, Suzuki H, Sugiyama Y "Quantitative evaluation of the function of small intestinal P-glycoprotein: comparative studies between in Situ and in Vivo." Pharm Res 20 (2003): 1163-9
  4. Eggleston W, Clark KH, Marraffa JM "Loperamide abuse associated with cardiac dysrhythmia and death." Ann Emerg Med 69 (2017): 83-6
  5. US Food and Drug Administration "FDA warns about serious heart problems with high doses of the antidiarrheal medicine loperamide (Imodium), including from abuse and misuse. http://www.fda.gov/downloads/Drugs/DrugSafety/UCM505108.pdf" (2016):
View all 5 references

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Drug and food interactions

Moderate

cycloSPORINE food

Applies to: cyclosporine

GENERALLY AVOID: Administration with grapefruit juice (compared to water or orange juice) has been shown to increase blood concentrations of cyclosporine with a relatively high degree of interpatient variability. The mechanism is inhibition of CYP450 3A4-mediated first-pass metabolism in the gut wall by certain compounds present in grapefruits.

GENERALLY AVOID: Administration with red wine or purple grape juice may decrease blood concentrations of cyclosporine. In 12 healthy volunteers, 12 ounces total of a merlot consumed 15 minutes prior to and during cyclosporine administration (single 8 mg/kg dose of Sandimmune) decreased cyclosporine peak blood concentration (Cmax) and systemic exposure (AUC) by 38% and 30%, respectively, compared to water. The time to reach peak concentration (Tmax) doubled, and oral clearance increased 50%. Similarly, one study were 12 healthy patients were administered purple grape juice and a single dose of cyclosporine showed a 30% and a 36% decrease in cyclosporine systemic exposure (AUC) and peak blood concentration (Cmax), respectively. The exact mechanism of interaction is unknown but may involve decreased cyclosporine absorption.

MONITOR: Food has been found to have variable effects on the absorption of cyclosporine. There have been reports of impaired, unchanged, and enhanced absorption during administration with meals relative to the fasting state. The mechanisms are unclear. Some investigators found an association with the fat content of food. In one study, increased fat intake resulted in significantly increased cyclosporine bioavailability and clearance. However, the AUC and pharmacodynamics of cyclosporine were not significantly affected, thus clinical relevance of these findings may be minimal.

MANAGEMENT: Patients receiving cyclosporine therapy should be advised to either refrain from or avoid fluctuations in the consumption of grapefruits and grapefruit juice. Until more data are available, the consumption of red wine or purple grape juice should preferably be avoided or limited. All oral formulations of cyclosporine should be administered on a consistent schedule with regard to time of day and relation to meals so as to avoid large fluctuations in plasma drug levels.

References

  1. Honcharik N, Yatscoff RW, Jeffery JR, Rush DN "The effect of meal composition on cyclosporine absorption." Transplantation 52 (1991): 1087-9
  2. Ducharme MP, Provenzano R, Dehoornesmith M, Edwards DJ "Trough concentrations of cyclosporine in blood following administration with grapefruit juice." Br J Clin Pharmacol 36 (1993): 457-9
  3. Bailey DG, Arnold JMO, Spence JD "Grapefruit juice and drugs - how significant is the interaction." Clin Pharmacokinet 26 (1994): 91-8
  4. Hollander AAMJ, Vanrooij J, Lentjes EGWM, Arbouw F, Vanbree JB, Schoemaker RC, Vanes LA, Vanderwoude FJ, Cohen AF "The effect of grapefruit juice on cyclosporine and prednisone metabolism in transplant patients." Clin Pharmacol Ther 57 (1995): 318-24
  5. "Grapefruit juice interactions with drugs." Med Lett Drugs Ther 37 (1995): 73-4
  6. Tan KKC, Trull AK, Uttridge JA, Metcalfe S, Heyes CS, Facey S, Evans DB "Effect of dietary fat on the pharmacokinetics and pharmacodynamics of cyclosporine in kidney transplant recipients." Clin Pharmacol Ther 57 (1995): 425-33
  7. Yee GC, Stanley DL, Pessa LJ, et al. "Effect of grrapefruit juice on blood cyclosporin concentration." Lancet 345 (1995): 955-6
  8. Ducharme MP, Warbasse LH, Edwards DJ "Disposition of intravenous and oral cyclosporine after administration with grapefruit juice." Clin Pharmacol Ther 57 (1995): 485-91
  9. Ioannidesdemos LL, Christophidis N, Ryan P, Angelis P, Liolios L, Mclean AJ "Dosing implications of a clinical interaction between grapefruit juice and cyclosporine and metabolite concentrations in patients with autoimmune diseases." J Rheumatol 24 (1997): 49-54
  10. Min DI, Ku YM, Perry PJ, Ukah FO, Ashton K, Martin MF, Hunsicker LG "Effect of grapefruit juice on cyclosporine pharmacokinetics in renal transplant patients." Transplantation 62 (1996): 123-5
  11. Bailey DG, Dresser GR, Kreeft JH, Munoz C, Freeman DJ, Bend JR "Grapefruit-felodipine interaction: Effect of unprocessed fruit and probable active ingredients." Clin Pharmacol Ther 68 (2000): 468-77
  12. Tsunoda SM, Harris RZ, Christians U, et al. "Red wine decreases cyclosporine bioavailability." Clin Pharmacol Ther 70 (2001): 462-7
  13. Oliveira-Freitas VL, Dalla Costa T, Manfro RC, Cruz LB, Schwartsmann G "Influence of purple grape juice in cyclosporine availability." J Ren Nutr 20 (2010): 309-13
View all 13 references

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Moderate

loperamide food

Applies to: Diar-Aid (loperamide)

GENERALLY AVOID: Alcohol may potentiate some of the pharmacologic effects of CNS-active agents. Use in combination may result in additive central nervous system depression and/or impairment of judgment, thinking, and psychomotor skills.

MANAGEMENT: Patients receiving CNS-active agents should be warned of this interaction and advised to avoid or limit consumption of alcohol. Ambulatory patients should be counseled to avoid hazardous activities requiring complete mental alertness and motor coordination until they know how these agents affect them, and to notify their physician if they experience excessive or prolonged CNS effects that interfere with their normal activities.

References

  1. Warrington SJ, Ankier SI, Turner P "Evaluation of possible interactions between ethanol and trazodone or amitriptyline." Neuropsychobiology 15 (1986): 31-7
  2. Gilman AG, eds., Nies AS, Rall TW, Taylor P "Goodman and Gilman's the Pharmacological Basis of Therapeutics." New York, NY: Pergamon Press Inc. (1990):
  3. "Product Information. Fycompa (perampanel)." Eisai Inc (2012):
  4. "Product Information. Rexulti (brexpiprazole)." Otsuka American Pharmaceuticals Inc (2015):
View all 4 references

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Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

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Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

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