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Drug Interactions between aminophylline / ephedrine / phenobarbital / potassium iodide and enoxacin

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

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Interactions between your drugs

Major

enoxacin aminophylline

Applies to: enoxacin and aminophylline / ephedrine / phenobarbital / potassium iodide

GENERALLY AVOID: Enoxacin has been shown to reduce theophylline clearance by up to 75%. The mechanism is inhibition of CYP450 1A2 hepatic metabolism. Theophylline serum levels increase 1.5 to 3.0 times when enoxacin is administered concurrently. Patients with chronic obstructive pulmonary disease, congestive heart failure, or cirrhosis may have slower theophylline clearance rates; therefore, they may be at greater risk of developing theophylline toxicity.

MANAGEMENT: If possible, enoxacin therapy should be avoided in patients receiving theophylline. Levofloxacin, sparfloxacin, moxifloxacin, gatifloxacin, trovafloxacin, and lomefloxacin have been reported to cause minor or no changes in theophylline levels and may be considered as alternatives. If enoxacin is given concomitantly with theophylline, the theophylline dosage should be reduced approximately 50% or more, and theophylline serum levels should be closely monitored. Patients should be advised to report any signs of theophylline toxicity including nausea, vomiting, diarrhea, headache, restlessness, insomnia, seizures, or irregular heartbeats to their physician.

References (18)
  1. Wijnands WJ, Vree TB (1988) "Interaction between the fluoroquinolones and the bronchodilator theophylline." J Antimicrob Chemother, 22, p. 109-14
  2. Sano M, Kawakatsu K, Yamamoto I, et al. (1989) "Inhibitory effect of enoxacin, ofloxacin and norfloxacin on renal excretion of theophylline in humans." Eur J Clin Pharmacol, 36, p. 323-4
  3. Wijnands WJ, Vree TB, Baars AM, van Herwaarden CL (1987) "Steady-state kinetics of the quinolone derivatives ofloxacin, enoxacin, ciprofloxacin and pefloxacin during maintneance treatment with theophylline." Drugs, 34, p. 159-69
  4. Sorgel F, Mahr G, Granneman GR, et al. (1992) "Effects of 2 quinolone antibacterials, temafloxacin and enoxacin, on theophylline pharmacokinetics." Clin Pharmacokinet, 22, p. 65-74
  5. Koup JR, Toothaker RD, Posvar E, et al. (1990) "Theophylline dosage adjustment during enoxacin coadministration." Antimicrob Agents Chemother, 34, p. 803-7
  6. Rogge MC, Solomon WR, Sedman AJ, et al. (1989) "The theophylline-enoxacin interaction. II: Changes in the disposition of theophylline and its metabolites during intermittent administration of enoxacin." Clin Pharmacol Ther, 46, p. 420-8
  7. Wijnands GJ, Vree TB, Janssen TJ, Guelen PJ (1989) "Drug-drug interactions affecting fluoroquinolones." Am J Med, 87, s47-51
  8. Harris JM (1990) "Drug interaction affecting theophylline clearance." J Pediatr, 116, p. 838-9
  9. Takagi K, Hasegawa T, Ogura Y, et al. (1988) "Comparative studies on interaction between theophylline and quinolones." J Asthma, 25, p. 63-70
  10. Rogge MC, Solomon WR, Sedman AJ, et al. (1988) "The theophylline-enoxacin interaction. I: effect of enoxacin dose size on theophylline disposition." Clin Pharmacol Ther, 44, p. 579-87
  11. Takagi K, Hasegawa T, Yamaki K, et al. (1988) "Interaction between theophylline and enoxacin." Int J Clin Pharmacol Ther Toxicol, 26, p. 288-92
  12. Beckmann J, Elsaber W, Gundert-Remy U, Hertrampf R (1987) "Enoxacin: a potent inhibitor of theophylline metabolism." Eur J Clin Pharmacol, 33, p. 227-30
  13. Wijnands WJ, Van Herwaarden CL (1984) "Enoxacin raises plasma theophylline concentrations." Lancet, 2, p. 108-9
  14. Wijnands WJ, Vree TB, van Herwaarden CL (1985) "Enoxacin decreases the clearance of theophylline in man." Br J Clin Pharmacol, 20, p. 583-8
  15. Sana M, Kawakatsu K, Ohkita C, et al. (1988) "Effects of enoxacin, ofloxacin and norfloxacin on theophylline disposition in humans." Eur J Clin Pharmacol, 35, p. 161-5
  16. Sijnands WJ, Vree TB, Baars AM, Van Herwaarden CL (1987) "Steady-state kinetics of the quinolone derivatives ofloxacin, enoxacin, ciprofloxacin and pefloxacin during maintenance treatment with theopylline." Drugs, 34, p. 159-69
  17. Upton RA (1991) "Pharmacokinetic interactions between theophylline and other medication (Part I)." Clin Pharmacokinet, 20, p. 66-80
  18. Limbird LE eds., Gilman AG, Hardman JG (1995) "Goodman and Gilman's the Pharmacological Basis of Therapeutics." New York, NY: McGraw-Hill
Moderate

PHENobarbital aminophylline

Applies to: aminophylline / ephedrine / phenobarbital / potassium iodide and aminophylline / ephedrine / phenobarbital / potassium iodide

MONITOR: Barbiturates may decrease serum levels and therapeutic effects of the methylxanthines. The mechanism is barbiturate induction of CYP450 3A4 and 1A2 hepatic metabolism of methylxanthines.

MANAGEMENT: Close observation for clinical and laboratory evidence of decreased methylxanthine effect is indicated if these drugs must be used together. Patients should be advised to notify their physician if they experience a worsening of their respiratory symptoms.

References (4)
  1. Upton RA (1991) "Pharmacokinetic interactions between theophylline and other medication (Part I)." Clin Pharmacokinet, 20, p. 66-80
  2. Bukowskyj M, Nakatsu K, Munt PW (1984) "Theophylline reassessed." Ann Intern Med, 101, p. 63-73
  3. Landay RA, Gonzalez MA, Taylor JC (1978) "Effect of phenobarbital on theophylline disposition." J Allergy Clin Immunol, 62, p. 27-9
  4. Dahlqvist R, Steiner E, Koike Y, von Bahr C, Lind M, Billing B (1989) "Induction of theophylline metabolism by pentobarbital." Ther Drug Monit, 11, p. 408-10
Minor

ePHEDrine aminophylline

Applies to: aminophylline / ephedrine / phenobarbital / potassium iodide and aminophylline / ephedrine / phenobarbital / potassium iodide

Ephedrine-methylxanthine combinations are used for the treatment of asthma but the efficacy of the combination has been questioned. This combination may lead to increased xanthine side effects. The mechanism is unknown, but may be related to synergistic pharmacologic effects. Patients using this combination should be closely monitored for side effects such as nausea, vomiting, tachycardia, nervousness, or insomnia. If side effects are noted, the dosage of the xanthine may need to be decreased.

References (5)
  1. Weinberger M, Bronsky E, Bensch GW, Bock GN, Yecies JJ (1975) "Interaction of ephedrine and theophylline." Clin Pharmacol Ther, 17, p. 585-92
  2. Sims JA, doPico GA, Reed CE (1978) "Bronchodilating effect of oral theophylline-ephedrine combination." J Allergy Clin Immunol, 62, p. 15-21
  3. Tinkelman DG, Avner SE (1977) "Ephedrine therapy in asthmatic children. Clinical tolerance and absence of side effects." JAMA, 237, p. 553-7
  4. Weinberger MM, Brousky EA (1974) "Evaluation of oral bronchodilator therapy in asthmatic children: bronchodilators in asthmatic children." J Pediatr, 84, p. 421-7
  5. Badiei B, Faciane J, Sly M (1975) "Effect of throphylline, ephedrine and theri combination upon exercise-induced airway obstruction." Ann Allergy, 35, p. 32-6

Drug and food/lifestyle interactions

Major

PHENobarbital food/lifestyle

Applies to: aminophylline / ephedrine / phenobarbital / potassium iodide

GENERALLY AVOID: Concurrent acute use of barbiturates and ethanol may result in additive CNS effects, including impaired coordination, sedation, and death. Tolerance of these agents may occur with chronic use. The mechanism is related to inhibition of microsomal enzymes acutely and induction of hepatic microsomal enzymes chronically.

MANAGEMENT: The combination of ethanol and barbiturates should be avoided.

References (5)
  1. Gupta RC, Kofoed J (1966) "Toxological statistics for barbiturates, other sedatives, and tranquilizers in Ontario: a 10-year survey." Can Med Assoc J, 94, p. 863-5
  2. Misra PS, Lefevre A, Ishii H, Rubin E, Lieber CS (1971) "Increase of ethanol, meprobamate and pentobarbital metabolism after chronic ethanol administration in man and in rats." Am J Med, 51, p. 346-51
  3. Saario I, Linnoila M (1976) "Effect of subacute treatment with hypnotics, alone or in combination with alcohol, on psychomotor skills related to driving." Acta Pharmacol Toxicol (Copenh), 38, p. 382-92
  4. Stead AH, Moffat AC (1983) "Quantification of the interaction between barbiturates and alcohol and interpretation of fatal blood concentrations." Hum Toxicol, 2, p. 5-14
  5. Seixas FA (1979) "Drug/alcohol interactions: avert potential dangers." Geriatrics, 34, p. 89-102
Moderate

enoxacin food/lifestyle

Applies to: enoxacin

GENERALLY AVOID: The oral bioavailability of quinolone and tetracycline antibiotics may be reduced by concurrent administration of preparations containing polyvalent cations such as aluminum, calcium, iron, magnesium, and zinc. Therapeutic failure may result. The proposed mechanism is chelation of quinolone and tetracycline antibiotics by di- and trivalent cations, forming an insoluble complex that is poorly absorbed from the gastrointestinal tract. Reduced gastrointestinal absorption of the cations should also be considered.

MANAGEMENT: Concomitant administration of oral quinolone and tetracycline antibiotics with preparations containing aluminum, calcium, iron, magnesium, and/or zinc salts should generally be avoided. Otherwise, the times of administration should be staggered by as much as possible to minimize the potential for interaction. Quinolones should typically be dosed either 2 to 4 hours before or 4 to 6 hours after polyvalent cation preparations, depending on the quinolone and formulation. Likewise, tetracyclines and polyvalent cation preparations should typically be administered 2 to 4 hours apart. The prescribing information for the antibiotic should be consulted for more specific dosing recommendations.

References (51)
  1. Polk RE, Helay DP, Sahai J, Drwal L, Racht E (1989) "Effect of ferrous sulfate and multivitamins with zinc on absorption of ciprofloxacin in normal volunteers." Antimicrob Agents Chemother, 33, p. 1841-4
  2. Nix DE, Watson WA, Lener ME, et al. (1989) "Effects of aluminum and magnesium antacids and ranitidine on the absorption of ciprofloxacin." Clin Pharmacol Ther, 46, p. 700-5
  3. Garrelts JC, Godley PJ, Peterie JD, Gerlach EH, Yakshe CC (1990) "Sucralfate significantly reduces ciprofloxacin concentrations in serum." Antimicrob Agents Chemother, 34, p. 931-3
  4. Frost RW, Lasseter KC, Noe AJ, Shamblen EC, Lettieri JT (1992) "Effects of aluminum hydroxide and calcium carbonate antacids on the bioavailability of ciprofloxacin." Antimicrob Agents Chemother, 36, p. 830-2
  5. Yuk JH (1989) "Ciprofloxacin levels when receiving sucralfate." J Am Geriatr Soc, 262, p. 901
  6. Neuvonen PJ (1976) "Interactions with the absorption of tetracyclines." Drugs, 11, p. 45-54
  7. Deppermann KM, Lode H, Hoffken G, Tschink G, Kalz C, Koeppe P (1989) "Influence of ranitidine, pirenzepine, and aluminum magnesium hydroxide on the bioavailability of various antibiotics, including amoxicillin, cephalexin, doxycycline, and amoxicillin-clavulanic acid." Antimicrob Agents Chemother, 33, p. 1901-7
  8. Nguyen VX, Nix DE, Gillikin S, Schentag JJ (1989) "Effect of oral antacid administration on the pharmacokinetics of intravenous doxycycline." Antimicrob Agents Chemother, 33, p. 434-6
  9. Campbell NR, Kara M, Hasinoff BB, Haddara WM, McKay DW (1992) "Norfloxacin interaction with antacids and minerals." Br J Clin Pharmacol, 33, p. 115-6
  10. Parpia SH, Nix DE, Hejmanowski LG, Goldstein HR, Wilton JH, Schentag JJ (1989) "Sucralfate reduces the gastrointestinal absorption of norfloxacin." Antimicrob Agents Chemother, 33, p. 99-102
  11. Nix DE, Wilton JH, Ronald B, Distlerath L, Williams VC, Norman A (1990) "Inhibition of norfloxacin absorption by antacids." Antimicrob Agents Chemother, 34, p. 432-5
  12. Akerele JO, Okhamafe AO (1991) "Influence of oral co-administered metallic drugs on ofloxacin pharmacokinetics." J Antimicrob Chemother, 28, p. 87-94
  13. Gothoni G, Neuvonen PJ, Mattila M, Hackman R (1972) "Iron-tetracycline interaction: effect of time interval between the drugs." Acta Med Scand, 191, p. 409-11
  14. Garty M, Hurwitz A (1980) "Effect of cimetidine and antacids on gastrointestinal absorption of tetracycline." Clin Pharmacol Ther, 28, p. 203-7
  15. Gotz VP, Ryerson GG (1986) "Evaluation of tetracycline on theophylline disposition in patients with chronic obstructive airways disease." Drug Intell Clin Pharm, 20, p. 694-6
  16. McCormack JP, Reid SE, Lawson LM (1990) "Theophylline toxicity induced by tetracycline." Clin Pharm, 9, p. 546-9
  17. D'Arcy PF, McElnay JC (1987) "Drug-antacid interactions: assessment of clinical importance." Drug Intell Clin Pharm, 21, p. 607-17
  18. Wadworth AN, Goa KL (1991) "Lomefloxacin: a review of its antibacterial activity, pharmacokinetic properties and therapeutic use." Drugs, 42, p. 1018-60
  19. Shimada J, Shiba K, Oguma T, et al. (1992) "Effect of antacid on absorption of the quinolone lomefloxacin." Antimicrob Agents Chemother, 36, p. 1219-24
  20. Upton RA (1991) "Pharmacokinetic interactions between theophylline and other medication (Part I)." Clin Pharmacokinet, 20, p. 66-80
  21. Venho VM, Salonen RO, Mattila MJ (1978) "Modification of the pharmacokinetics of doxycycline in man by ferrous sulphate or charcoal." Eur J Clin Pharmacol, 14, p. 277-80
  22. (2002) "Product Information. Minocin (minocycline)." Lederle Laboratories
  23. Sahai J, Healy DP, Stotka J, Polk RE (1993) "The influence of chronic administration of calcium carbonate on the bioavailability of oral ciprofloxacin." Br J Clin Pharmacol, 35, p. 302-4
  24. (2001) "Product Information. Declomycin (demeclocycline)." Lederle Laboratories
  25. Lehto P, Kivisto KT (1994) "Effect of sucralfate on absorption of norfloxacin and ofloxacin." Antimicrob Agents Chemother, 38, p. 248-51
  26. Noyes M, Polk RE (1988) "Norfloxacin and absorption of magnesium-aluminum." Ann Intern Med, 109, p. 168-9
  27. Grasela TH Jr, Schentag JJ, Sedman AJ, et al. (1989) "Inhibition of enoxacin absorption by antacids or ranitidine." Antimicrob Agents Chemother, 33, p. 615-7
  28. Campbell NR, Hasinoff BB (1991) "Iron supplements: a common cause of drug interactions." Br J Clin Pharmacol, 31, p. 251-5
  29. Covington TR, eds., Lawson LC, Young LL (1993) "Handbook of Nonprescription Drugs." Washington, DC: American Pharmaceutical Association
  30. Lehto P, Kivisto KT (1994) "Different effects of products containing metal ions on the absorption of lomefloxacin." Clin Pharmacol Ther, 56, p. 477-82
  31. Bateman FJ (1970) "Effects of tetracyclines." Br Med J, 4, p. 802
  32. Neuvonen PJ, Gothoni G, Hackman R, Bjorksten K (1970) "Interference of iron with the absorption of tetracyclines in man." Br Med J, 4, p. 532-4
  33. Greenberger NJ (1971) "Absorption of tetracyclines: interference by iron." Ann Intern Med, 74, p. 792-3
  34. Neuvonen PJ, Penttila O (1974) "Effect of oral ferrous sulphate on the half-life of doxycycline in man." Eur J Clin Pharmacol, 7, p. 361-3
  35. Spivey JM, Cummings DM, Pierson NR (1996) "Failure of prostatitis treatment secondary to probable ciprofloxacin-sucralfate drug interaction." Pharmacotherapy, 16, p. 314-6
  36. (2001) "Product Information. Levaquin (levofloxacin)." Ortho McNeil Pharmaceutical
  37. (2001) "Product Information. Raxar (grepafloxacin)." Glaxo Wellcome
  38. (2001) "Product Information. Zagam (sparfloxacin)." Rhone Poulenc Rorer
  39. (2001) "Product Information. Trovan (trovafloxacin)." Pfizer U.S. Pharmaceuticals
  40. Teng R, Dogolo LC, Willavize SA, Friedman HL, Vincent J (1997) "Effect of Maalox and omeprazole on the bioavailability of trovafloxacin." J Antimicrob Chemother, 39 Suppl B, p. 93-7
  41. Zix JA, Geerdes-Fenge HF, Rau M, Vockler J, Borner K, Koeppe P, Lode H (1997) "Pharmacokinetics of sparfloxacin and interaction with cisapride and sucralfate." Antimicrob Agents Chemother, 41, p. 1668-72
  42. Honig PK, Gillespie BK (1998) "Clinical significance of pharmacokinetic drug interactions with over-the-counter (OTC) drugs." Clin Pharmacokinet, 35, p. 167-71
  43. Johnson RD, Dorr MB, Talbot GH, Caille G (1998) "Effect of Maalox on the oral absorption of sparfloxacin." Clin Ther, 20, p. 1149-58
  44. Lober S, Ziege S, Rau M, Schreiber G, Mignot A, Koeppe P, Lode H (1999) "Pharmacokinetics of gatifloxacin and interaction with an antacid containing aluminum and magnesium." Antimicrob Agents Chemother, 43, p. 1067-71
  45. Allen A, Vousden M, Porter A, Lewis A (1999) "Effect of Maalox((R)) on the bioavailability of oral gemifloxacin in healthy volunteers." Chemotherapy, 45, p. 504-11
  46. Kamberi M, Nakashima H, Ogawa K, Oda N, Nakano S (2000) "The effect of staggered dosing of sucralfate on oral bioavailability of sparfloxacin." Br J Clin Pharmacol, 49, p. 98-103
  47. (2003) "Product Information. Factive (gemifloxacin)." *GeneSoft Inc
  48. (2010) "Product Information. Suprep Bowel Prep Kit (magnesium/potassium/sodium sulfates)." Braintree Laboratories
  49. (2017) "Product Information. Baxdela (delafloxacin)." Melinta Therapeutics, Inc.
  50. (2018) "Product Information. Seysara (sarecycline)." Allergan Inc
  51. (2018) "Product Information. Nuzyra (omadacycline)." Paratek Pharmaceuticals, Inc.
Moderate

enoxacin food/lifestyle

Applies to: enoxacin

MONITOR: Coadministration with certain quinolones may increase the plasma concentrations and pharmacologic effects of caffeine due to inhibition of the CYP450 1A2 metabolism of caffeine. Quinolones that may inhibit CYP450 1A2 include ciprofloxacin, enoxacin, grepafloxacin, nalidixic acid, norfloxacin, pipemidic acid, and pefloxacin (not all commercially available). In healthy volunteers, enoxacin (100 to 400 mg twice daily) increased systemic exposure (AUC) of caffeine by 2- to 5-fold and reduced its clearance by approximately 80%. Pipemidic acid (400 to 800 mg twice daily) increased AUC of caffeine by 2- to 3-fold and reduced its clearance by approximately 60%. Ciprofloxacin (250 to 750 mg twice daily) increased AUC and elimination half-life of caffeine by 50% to over 100%, and reduced its clearance by 30% to 50%. Norfloxacin 400 mg twice daily increased caffeine AUC by 16%, while 800 mg twice daily increased caffeine AUC by 52% and reduced its clearance by 35%. Pefloxacin (400 mg twice daily) has been shown to reduce caffeine clearance by 47%.

MANAGEMENT: Patients using caffeine-containing products should be advised that increased adverse effects such as headache, tremor, restlessness, nervousness, insomnia, tachycardia, and blood pressure increases may occur during coadministration with quinolones that inhibit CYP450 1A2. Caffeine intake should be limited when taking high dosages of these quinolones. If an interaction is suspected, other quinolones such as gatifloxacin, gemifloxacin, levofloxacin, lomefloxacin, moxifloxacin, and ofloxacin may be considered, since they are generally believed to have little or no effect on CYP450 1A2 or have been shown not to interact with caffeine.

References (17)
  1. Polk RE (1989) "Drug-drug interactions with ciprofloxacin and other fluoroquinolones." Am J Med, 87, s76-81
  2. Healy DP, Polk RE, Kanawati L, Rock DT, Mooney ML (1989) "Interaction between oral ciprofloxacin and caffeine in normal volunteers." Antimicrob Agents Chemother, 33, p. 474-8
  3. Harder S, Fuhr U, Staib AH, Wolf T (1989) "Ciprofloxacin-caffeine: a drug interaction established using in vivo and in vitro investigations." Am J Med, 87, p. 89-91
  4. Carbo ML, Segura J, De la Torre R, et al. (1989) "Effect of quinolones on caffeine disposition." Clin Pharmacol Ther, 45, p. 234-40
  5. (1993) "Product Information. Penetrax (enoxacin)." Rhone-Poulenc Rorer, Collegeville, PA.
  6. Mahr G, Sorgel F, Granneman GR, et al. (1992) "Effects of temafloxacin and ciprofloxacin on the pharmacokinetics of caffeine." Clin Pharmacokinet, 22, p. 90-7
  7. (2002) "Product Information. Cipro (ciprofloxacin)." Bayer
  8. (2001) "Product Information. Noroxin (norfloxacin)." Merck & Co., Inc
  9. Staib AH, Stille W, Dietlein G, et al. (1987) "Interaction between quinolones and caffeine." Drugs, 34 Suppl 1, p. 170-4
  10. Stille W, Harder S, Micke S, et al. (1987) "Decrease of caffeine elimination in man during co-administration of 4-quinolones." J Antimicrob Chemother, 20, p. 729-34
  11. Harder S, Staib AH, Beer C, Papenburg A, Stille W, Shah PM (1988) "4-Quinolones inhibit biotransformation of caffeine." Eur J Clin Pharmacol, 35, p. 651-6
  12. Nicolau DP, Nightingale CH, Tessier PR, et al. (1995) "The effect of fleroxacin and ciprofloxacin on the pharmacokinetics of multiple dose caffeine." Drugs, 49 Suppl 2, p. 357-9
  13. (2001) "Product Information. Raxar (grepafloxacin)." Glaxo Wellcome
  14. Carrillo JA, Benitez J (2000) "Clinically significant pharmacokinetic interactions between dietary caffeine and medications." Clin Pharmacokinet, 39, p. 127-53
  15. Fuhr U, Wolff T, Harder S, Schymanski P, Staib AH (1990) "Quinolone inhibition of cytochrome P-450 dependent caffeine metabolism in human liver microsomes." Drug Metab Dispos, 18, p. 1005-10
  16. Kinzig-Schippers M, Fuhr U, Zaigler M, et al. (1999) "Interaction of pefloxacin and enoxacin with the human cytochrome P450 enzyme CYP1A2." Clin Pharmacol Ther, 65, p. 262-74
  17. Healy DP, Schoenle JR, Stotka J, Polk RE (1991) "Lack of interaction between lomefloxacin and caffeine in normal volunteers." Antimicrob Agents Chemother, 35, p. 660-4
Moderate

ePHEDrine food/lifestyle

Applies to: aminophylline / ephedrine / phenobarbital / potassium iodide

MONITOR: Coadministration of two or more sympathomimetic agents may increase the risk of adverse effects such as nervousness, irritability, and increased heart rate. Central nervous system (CNS) stimulants, particularly amphetamines, can potentiate the adrenergic response to vasopressors and other sympathomimetic agents. Additive increases in blood pressure and heart rate may occur due to enhanced peripheral sympathetic activity.

MANAGEMENT: Caution is advised if two or more sympathomimetic agents are coadministered. Pulse and blood pressure should be closely monitored.

References (7)
  1. Rosenblatt JE, Lake CR, van Kammen DP, Ziegler MG, Bunney WE Jr (1979) "Interactions of amphetamine, pimozide, and lithium on plasma norepineophrine and dopamine-beta-hydroxylase in schizophrenic patients." Psychiatry Res, 1, p. 45-52
  2. Cavanaugh JH, Griffith JD, Oates JA (1970) "Effect of amphetamine on the pressor response to tyramine: formation of p-hydroxynorephedrine from amphetamine in man." Clin Pharmacol Ther, 11, p. 656
  3. (2001) "Product Information. Adderall (amphetamine-dextroamphetamine)." Shire Richwood Pharmaceutical Company Inc
  4. (2001) "Product Information. Tenuate (diethylpropion)." Aventis Pharmaceuticals
  5. (2001) "Product Information. Sanorex (mazindol)." Novartis Pharmaceuticals
  6. (2001) "Product Information. Focalin (dexmethylphenidate)." Mikart Inc
  7. (2002) "Product Information. Strattera (atomoxetine)." Lilly, Eli and Company
Moderate

aminophylline food/lifestyle

Applies to: aminophylline / ephedrine / phenobarbital / potassium iodide

MONITOR: Coadministration of two or more sympathomimetic agents may increase the risk of adverse effects such as nervousness, irritability, and increased heart rate. Central nervous system (CNS) stimulants, particularly amphetamines, can potentiate the adrenergic response to vasopressors and other sympathomimetic agents. Additive increases in blood pressure and heart rate may occur due to enhanced peripheral sympathetic activity.

MANAGEMENT: Caution is advised if two or more sympathomimetic agents are coadministered. Pulse and blood pressure should be closely monitored.

References (7)
  1. Rosenblatt JE, Lake CR, van Kammen DP, Ziegler MG, Bunney WE Jr (1979) "Interactions of amphetamine, pimozide, and lithium on plasma norepineophrine and dopamine-beta-hydroxylase in schizophrenic patients." Psychiatry Res, 1, p. 45-52
  2. Cavanaugh JH, Griffith JD, Oates JA (1970) "Effect of amphetamine on the pressor response to tyramine: formation of p-hydroxynorephedrine from amphetamine in man." Clin Pharmacol Ther, 11, p. 656
  3. (2001) "Product Information. Adderall (amphetamine-dextroamphetamine)." Shire Richwood Pharmaceutical Company Inc
  4. (2001) "Product Information. Tenuate (diethylpropion)." Aventis Pharmaceuticals
  5. (2001) "Product Information. Sanorex (mazindol)." Novartis Pharmaceuticals
  6. (2001) "Product Information. Focalin (dexmethylphenidate)." Mikart Inc
  7. (2002) "Product Information. Strattera (atomoxetine)." Lilly, Eli and Company

Therapeutic duplication warnings

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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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