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Duloxetine and Echinacea

Determining the interaction of Duloxetine and Echinacea and the possibility of their joint administration.

Check result:
Duloxetine <> Echinacea
Relevance: 09.11.2023 Reviewer: Shkutko P.M., M.D., in

In the database of official manuals used in the service creation an interaction registered by statistical results of studies was found, which can either lead to negative consequences for the patient health or strengthen a mutual positive effect. A doctor should be consulted to address the issue of joint drug administration.

Consumer:

Consumer information for this interaction is not currently available.MONITOR: Coadministration with inhibitors of CYP450 1A2 may increase the plasma concentrations of duloxetine, which is a substrate of the isoenzyme. In 14 male study subjects, coadministration with 100 mg fluvoxamine, a potent CYP450 1A2 inhibitor, resulted in a 2.5-fold increase in duloxetine peak plasma concentration (Cmax), a nearly 6-fold increase in duloxetine systemic exposure (AUC), and an approximately 3-fold increase in duloxetine half-life. The interaction has not been studied with less potent CYP450 1A2 inhibitors such as mexiletine, propafenone, and zileuton. Theoretically, high plasma levels of duloxetine may increase the risk of serious adverse effects such as hypertension, hypertensive crisis, increased heart rate, orthostatic hypotension, syncope, and serotonin syndrome. Serotonin syndrome is a rare but serious and potentially fatal condition thought to result from hyperstimulation of brainstem 5-HT1A and 2A receptors. Symptoms may include mental status changes such as irritability, altered consciousness, confusion, hallucinations, and coma; autonomic dysfunction such as tachycardia, hyperthermia, diaphoresis, shivering, blood pressure lability, and mydriasis; neuromuscular abnormalities such as hyperreflexia, myoclonus, tremor, and ataxia; and gastrointestinal symptoms such as abdominal cramping, nausea, vomiting, and diarrhea. MANAGEMENT: Caution is advised if duloxetine is used in combination with CYP450 1A2 inhibitors. Pharmacologic response to duloxetine should be monitored more closely whenever a CYP450 1A2 inhibitor is added to or withdrawn from therapy, and the dosage adjusted as necessary. References Uwe F, Strobl G, Manaut F, et al "Quinolone antibacterial agents: relationship between structure and in vitro inhibition of the human cytochrome P450 isofaorm CYP1A2." Mol Pharmacol 43 (1993): 191-9 Brosen K, Skjelbo E, Rasmussen BB, Poulsen HE, Loft S "Fluvoxamine is a potent inhibitor of cytochrome P4501A2." Biochem Pharmacol 45 (1993): 1211-4 Martinez C, Albet C, Agundez JA, et al. "Comparative in vitro and in vivo inhibition of cytochrome P450 CYP1A2, CYP2D6, and CYP3A by H2-receptor antagonists." Clin Pharmacol Ther 65 (1999): 369-76 "Product Information. Cymbalta (duloxetine)." Lilly, Eli and Company, Indianapolis, IN. View all 4 references

Professional:

MONITOR: Coadministration with inhibitors of CYP450 1A2 may increase the plasma concentrations of duloxetine, which is a substrate of the isoenzyme. In 14 male study subjects, coadministration with 100 mg fluvoxamine, a potent CYP450 1A2 inhibitor, resulted in a 2.5-fold increase in duloxetine peak plasma concentration (Cmax), a nearly 6-fold increase in duloxetine systemic exposure (AUC), and an approximately 3-fold increase in duloxetine half-life. The interaction has not been studied with less potent CYP450 1A2 inhibitors such as mexiletine, propafenone, and zileuton. Theoretically, high plasma levels of duloxetine may increase the risk of serious adverse effects such as hypertension, hypertensive crisis, increased heart rate, orthostatic hypotension, syncope, and serotonin syndrome. Serotonin syndrome is a rare but serious and potentially fatal condition thought to result from hyperstimulation of brainstem 5-HT1A and 2A receptors. Symptoms may include mental status changes such as irritability, altered consciousness, confusion, hallucinations, and coma; autonomic dysfunction such as tachycardia, hyperthermia, diaphoresis, shivering, blood pressure lability, and mydriasis; neuromuscular abnormalities such as hyperreflexia, myoclonus, tremor, and ataxia; and gastrointestinal symptoms such as abdominal cramping, nausea, vomiting, and diarrhea.

MANAGEMENT: Caution is advised if duloxetine is used in combination with CYP450 1A2 inhibitors. Pharmacologic response to duloxetine should be monitored more closely whenever a CYP450 1A2 inhibitor is added to or withdrawn from therapy, and the dosage adjusted as necessary.

References
  • Uwe F, Strobl G, Manaut F, et al "Quinolone antibacterial agents: relationship between structure and in vitro inhibition of the human cytochrome P450 isofaorm CYP1A2." Mol Pharmacol 43 (1993): 191-9
  • Brosen K, Skjelbo E, Rasmussen BB, Poulsen HE, Loft S "Fluvoxamine is a potent inhibitor of cytochrome P4501A2." Biochem Pharmacol 45 (1993): 1211-4
  • Martinez C, Albet C, Agundez JA, et al. "Comparative in vitro and in vivo inhibition of cytochrome P450 CYP1A2, CYP2D6, and CYP3A by H2-receptor antagonists." Clin Pharmacol Ther 65 (1999): 369-76
  • "Product Information. Cymbalta (duloxetine)." Lilly, Eli and Company, Indianapolis, IN.
Duloxetine

Generic Name: duloxetine

Brand name: Cymbalta, Irenka, Drizalma Sprinkle

Synonyms: DULoxetine

Echinacea

Generic Name: echinacea

Brand name:

Synonyms: n.a.

In the course of checking the drug compatibility and interactions, data from the following reference sources was used: Drugs.com, Rxlist.com, Webmd.com, Medscape.com.

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