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Drug Interactions between Celexa and dipyridamole

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

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Interactions between your drugs

Moderate

dipyridamole citalopram

Applies to: dipyridamole and Celexa (citalopram)

MONITOR: Serotonin reuptake inhibitors (SRIs) may potentiate the risk of bleeding in patients treated with ulcerogenic agents and agents that affect hemostasis such as anticoagulants, platelet inhibitors, thrombin inhibitors, thrombolytic agents, or agents that commonly cause thrombocytopenia. The tricyclic antidepressant, clomipramine, is also a strong SRI and may interact similarly. Serotonin release by platelets plays an important role in hemostasis, thus SRIs may alter platelet function and induce bleeding. Published case reports have documented the occurrence of bleeding episodes in patients treated with psychotropic agents that interfere with serotonin reuptake. Bleeding events related to SRIs have ranged from ecchymosis, hematoma, epistaxis, and petechiae to life-threatening hemorrhages. Additional epidemiological studies have confirmed the association between use of these agents and the occurrence of upper gastrointestinal bleeding, and concurrent use of NSAIDs or aspirin was found to potentiate the risk. Preliminary data also suggest that there may be a pharmacodynamic interaction between SSRIs and oral anticoagulants that can cause an increased bleeding diathesis. Concomitant administration of paroxetine and warfarin, specifically, has been associated with an increased frequency of bleeding without apparent changes in the disposition of either drug or changes in the prothrombin time. Bleeding has also been reported with fluoxetine and warfarin, while citalopram and sertraline have been reported to prolong the prothrombin time of patients taking warfarin by about 5% to 8%. In the RE-LY study (Randomized Evaluation of Long-term anticoagulant therapy), SRIs were associated with an increased risk of bleeding in all treatment groups.

MANAGEMENT: Caution is advised if SRIs or clomipramine are used in combination with other drugs that affect hemostasis. Close clinical and laboratory observation for hematologic complications is recommended. Patients should be advised to promptly report any signs of bleeding to their physician, including pain, swelling, headache, dizziness, weakness, prolonged bleeding from cuts, increased menstrual flow, vaginal bleeding, nosebleeds, bleeding of gums from brushing, unusual bleeding or bruising, red or brown urine, or red or black stools.

References

  1. Aranth J, Lindberg C (1992) "Bleeding, a side effect of fluoxetine." Am J Psychiatry, 149, p. 412
  2. Claire RJ, Servis ME, Cram DL Jr (1991) "Potential interaction between warfarin sodium and fluoxetine." Am J Psychiatry, 148, p. 1604
  3. Yaryura-Tobias JA, Kirschen H, Ninan P, Mosberg HJ (1991) "Fluoxetine and bleeding in obsessive-compulsive disorder." Am J Psychiatry, 148, p. 949
  4. Humphries JE, Wheby MS, VandenBerg SR (1990) "Fluoxetine and the bleeding time." Arch Pathol Lab Med, 114, p. 727-8
  5. Alderman CP, Moritz CK, Ben-Tovim DI (1992) "Abnormal platelet aggregation associated with fluoxetine therapy." Ann Pharmacother, 26, p. 1517-9
  6. Ciraulo DA, Shader RI (1990) "Fluoxetine drug-drug interactions. II." J Clin Psychopharmacol, 10, p. 213-7
  7. (2001) "Product Information. Zoloft (sertraline)." Roerig Division
  8. Woolfrey S, Gammack NS, Dewar MS, Brown PJ (1993) "Fluoxetine-warfarin interaction." BMJ, 307, p. 241
  9. (2001) "Product Information. Prozac (fluoxetine)." Dista Products Company
  10. (2001) "Product Information. Effexor (venlafaxine)." Wyeth-Ayerst Laboratories
  11. Bannister SJ, Houser VP, Hulse JD, Kisicki JC, Rasmussen JG (1989) "Evaluation of the potential for interactions of paroxetine with diazepam, cimetidine, warfarin, and digoxin." Acta Psychiatr Scand Suppl, 350, p. 102-6
  12. (2001) "Product Information. Paxil (paroxetine)." GlaxoSmithKline
  13. Messiha FS (1993) "Fluoxetine - adverse effects and drug-drug interactions." J Toxicol Clin Toxicol, 31, p. 603-30
  14. Ottervanger JP, Stricker BH, Huls J, Weeda JN (1994) "Bleeding attributed to the intake of paroxetine." Am J Psychiatry, 151, p. 781-2
  15. (2001) "Product Information. Luvox (fluvoxamine)." Solvay Pharmaceuticals Inc
  16. Krivy J, Wiener J (1995) "Sertraline and platelet counts in idiopathic thrombocytopenia purpura." Lancet, 345, p. 132
  17. Skop BP, Brown TM (1996) "Potential vascular and bleeding complications of treatment with selective serotonin reuptake inhibitors." Psychosomatics, 37, p. 12-6
  18. Pai VB, Kelly MW (1996) "Bruising associated with the use of fluoxetine." Ann Pharmacother, 30, p. 786-8
  19. Alderman CP, Seshadri P, Ben-Tovim DI (1996) "Effects of serotonin reuptake inhibitors on hemostasis." Ann Pharmacother, 30, p. 1232-4
  20. Leung M, Shore R (1996) "Fluvoxamine-associated bleeding." Can J Psychiatry, 41, p. 604-5
  21. Dent LA, Orrock MW (1997) "Warfarin-fluoxetine and diazepam-fluoxetine interaction." Pharmacotherapy, 17, p. 170-2
  22. Ford MA, Anderson ML, Rindone JP, Jaskar DW (1997) "Lack of effect of fluoxetine on the hypoprothrombinemic response of warfarin." J Clin Psychopharmacol, 17, p. 110-2
  23. (2001) "Product Information. Celexa (citalopram)." Forest Pharmaceuticals
  24. de Abajo FJ, Rodriguez LA, Montero D (1999) "Association between selective serotonin reuptake inhibitors and upper gastrointestinal bleeding: population based case-control study." BMJ, 319, p. 1106-9
  25. de Abajo FJ, Jick H, Derby L, Jick S, Schmitz S (2000) "Intracranial haemorrhage and use of selective serotonin reuptake inhibitors." Br J Clin Pharmacol, 50, p. 43-7
  26. Settle EC (1998) "Antidepressant drugs: disturbing and potentially dangerous adverse effects." J Clin Psychiatry, 59 Suppl 16, p. 25-30
  27. Hergovich N, Aigner M, Eichler HG, Entlicher J, Drucker C, Jilma B (2000) "Paroxetine decreases platelet serotonin storage and platelet function in human beings." Clin Pharmacol Ther, 68, p. 435-42
  28. Layton D, Clark DWJ, Pearce GL, Shakir SAW (2001) "Is there an association between selective serotonin reuptake inhibitors and risk of abnormal bleeding? Results from a cohort study based on prescription event monitoring in England." Eur J Clin Pharmacol, 57, p. 167-76
  29. (2002) "Product Information. Lexapro (escitalopram)." Forest Pharmaceuticals
  30. de Maistre E, Allart C, Lecompte T, Bollaert PE (2002) "Severe bleeding associated with use of low molecular weight heparin and selective serotonin reuptake inhibitors." Am J Med, 113, p. 530-2
  31. Dalton SO, Johansen C, Mellemkjaer L, Norgard B, Sorensen HT, Olsen JH (2003) "Use of selective serotonin reuptake inhibitors and risk of upper gastrointestinal tract bleeding: a population-based cohort study." Arch Intern Med, 163, p. 59-64
  32. (2004) "Product Information. Cymbalta (duloxetine)." Lilly, Eli and Company
  33. Tata LJ, Fortun PJ, Hubbard RB, et al. (2005) "Does concurrent prescription of selective serotonin reuptake inhibitors and non-steroidal anti-inflammatory drugs substantially increase the risk of upper gastrointestinal bleeding?" Aliment Pharmacol Ther, 22, p. 175-81
  34. Cerner Multum, Inc. "Australian Product Information."
  35. (2008) "Product Information. Pristiq (desvenlafaxine)." Wyeth Laboratories
  36. (2009) "Product Information. Savella (milnacipran)." Forest Pharmaceuticals
  37. (2011) "Product Information. Viibryd (vilazodone)." Trovis Pharmaceuticals LLC
  38. (2013) "Product Information. Fetzima (levomilnacipran)." Forest Pharmaceuticals
  39. (2013) "Product Information. Brintellix (vortioxetine)." Takeda Pharmaceuticals America
View all 39 references

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Drug and food interactions

Moderate

dipyridamole food

Applies to: dipyridamole

ADJUST DOSING INTERVAL: Caffeine and other xanthine derivatives (e.g., theophylline) are nonspecific, competitive antagonists of adenosine receptors. As such, they may interfere with the vasodilating effect of dipyridamole, an adenosine receptor agonist. In studies of healthy volunteers, caffeine has been shown to reduce the hemodynamic response (i.e., heart rate increases, vasodilation, blood pressure changes) to dipyridamole infusions, and both caffeine and theophylline have been reported to cause false-negative results in myocardial scintigraphy tests using dipyridamole.

MANAGEMENT: Patients should avoid consumption of caffeine-containing products for at least 24 hours prior to administration of dipyridamole for myocardial perfusion imaging.

References

  1. Smits P, Aengevaeren WR, Corstens FH, Thien T (1989) "Caffeine reduces dipyridamole-induced myocardial ischemia." J Nucl Med, 30, p. 1723-6
  2. (2002) "Product Information. Persantine (dipyridamole)." Boehringer-Ingelheim
  3. Ranhosky A, Kempthorne-Rawson J, the Intravenous Dipyridamole Thallium Imaging Study Group (1990) "The safety of intravenous dipyridamole thallium myocardial perfusion imaging." Circulation, 81, p. 1205-9

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Moderate

citalopram food

Applies to: Celexa (citalopram)

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

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Moderate

dipyridamole food

Applies to: dipyridamole

ADJUST DOSING INTERVAL: Methylxanthines (e.g., caffeine, theophylline) are nonspecific, competitive antagonists of adenosine receptors. As such, they may interfere with the pharmacologic effects of adenosine and other adenosine receptor agonists such as dipyridamole and regadenoson. There have been case reports of patients receiving theophylline who required higher than normal dosages of adenosine for the treatment of paroxysmal supraventricular tachycardia. In studies of healthy volunteers, caffeine and theophylline have been shown to reduce the cardiovascular response to adenosine infusions (i.e., heart rate increases, vasodilation, blood pressure changes), and theophylline has also been shown to attenuate adenosine-induced respiratory effects and chest pain/discomfort. Similarly, caffeine has been found to reduce the hemodynamic response to dipyridamole, and both caffeine and theophylline have been reported to cause false-negative results in myocardial scintigraphy tests using dipyridamole. In a placebo-controlled study that assessed the effects of oral caffeine on regadenoson-induced increase in coronary flow reserve (CFR), healthy subjects who took caffeine 200 mg orally two hours prior to regadenoson administration exhibited a median CFR that was 92% that of subjects who took placebo. The study was done using positron emission tomography with radiolabeled water.

MANAGEMENT: Clinicians should be aware that adenosine and other adenosine receptor agonists may be less effective in the presence of methylxanthines. Methylxanthines including caffeine should be withheld for 12 to 24 hours (or five half-lives) prior to administration of adenosine receptor agonists for myocardial perfusion imaging. However, parenteral aminophylline should be readily available for treating severe or persistent adverse reactions to adenosine receptor agonists such as bronchospasm or chest pain.

References

  1. Conti CR (1991) "Adenosine: clinical pharmacology and applications." Clin Cardiol, 14, p. 91-3
  2. Smits P, Aengevaeren WR, Corstens FH, Thien T (1989) "Caffeine reduces dipyridamole-induced myocardial ischemia." J Nucl Med, 30, p. 1723-6
  3. Smits P, Schouten J, Thien T (1987) "Respiratory stimulant effects of adenosine in man after caffeine and enprofylline." Br J Clin Pharmacol, 24, p. 816-9
  4. Minton NA, Henry JA (1991) "Pharmacodynamic interactions between infused adenosine and oral theophylline." Hum Exp Toxicol, 10, p. 411-8
  5. (2002) "Product Information. Persantine (dipyridamole)." Boehringer-Ingelheim
  6. (2001) "Product Information. Adenocard (adenosine)." Fujisawa
  7. Ranhosky A, Kempthorne-Rawson J, the Intravenous Dipyridamole Thallium Imaging Study Group (1990) "The safety of intravenous dipyridamole thallium myocardial perfusion imaging." Circulation, 81, p. 1205-9
  8. (2001) "Product Information. Adenoscan (adenosine)." Fujisawa
  9. (2008) "Product Information. Lexiscan (regadenoson)." Astellas Pharma US, Inc
View all 9 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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