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Drug Interactions between doxepin topical and ma huang

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

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Interactions between your drugs

Moderate

doxepin topical ma huang

Applies to: doxepin topical and ma huang

MONITOR: The use of tricyclic antidepressants in combination with amphetamines or sympathomimetic appetite suppressants may produce additive cardiovascular effects, increasing the risk of hypertension, cardiac arrhythmias, tachycardia, and fever. The mechanism involves additive pharmacodynamic effects resulting from increased norepinephrine release by sympathomimetic agents and inhibition of norepinephrine reuptake by tricyclic antidepressants. A pharmacokinetic interaction is also possible between tricyclic antidepressants and amphetamines, since many of these agents are metabolized by CYP450 2D6. Increased plasma levels of one or both drugs may occur during coadministration.

MANAGEMENT: Close monitoring of cardiovascular status is recommended for patients receiving this combination. Patients should be advised to promptly report symptoms such as fever, headache, or fast or irregular heartbeats.

References (8)
  1. Raisfeld IH (1972) "Cardiovascular complications of antidepressant therapy: interactions at the adrenergic neuron." Am Heart J, 83, p. 129-33
  2. Limbird LE eds., Gilman AG, Hardman JG (1995) "Goodman and Gilman's the Pharmacological Basis of Therapeutics." New York, NY: McGraw-Hill
  3. Nielsen KK, Flinois JP, Beaune P, Brosen K (1996) "The biotransformation of clomipramine in vitro, identification of the cytochrome p450s responsible for the separate metabolic pathways." J Pharmacol Exp Ther, 277, p. 1659-64
  4. Gunne LM, Antonijevic S, Jonsson J (1975) "Effect of fenfluramine on steady state plasma levels of amitriptyline." Postgrad Med J, 51 Suppl 1, p. 117
  5. Markowitz JS, Patrick KS (2001) "Pharmacokinetic and pharmacodynamic drug interactions in the treatment of attention-deficit hyperactivity disorder." Clin Pharmacokinet, 40, p. 753-72
  6. Kirchheiner J, Muller G, Meineke I, Wernecke KD, Roots I, Brockmoller J (2003) "Effects of polymorphisms in CYP2D6, CYP2C9, and CYP2C19 on trimipramine pharmacokinetics." J Clin Psychopharmacol, 23, p. 459-66
  7. Kirchheiner J, Meineke I, Muller G, Roots I, Brockmoller J (2002) "Contributions of CYP2D6, CYP2C9 and CYP2C19 to the biotransformation of E- and Z-doxepin in healthy volunteers." Pharmacogenetics, 12, p. 571-80
  8. Haritos VS, Ghabrial H, Ahokas JT, Ching MS (2000) "Role of cytochrome P450 2D6 (CYP2D6) in the stereospecific metabolism of E- and Z-doxepin." Pharmacogenetics, 10, p. 591-603

Drug and food interactions

No alcohol/food interactions were found. However, this does not necessarily mean no interactions exist. Always consult your healthcare provider.

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.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

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