Cymbalta contraindications
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Contraindications of Cymbalta (Duloxetine)
Hypersensitivity to Components
Cymbalta (duloxetine) is contraindicated in individuals who have shown hypersensitivity to any of its components. This includes the active ingredient, duloxetine, as well as other ingredients such as sucrose .
Combination with MAOIs
Duloxetine should not be used in combination with monoamine oxidase inhibitors (MAOIs). This combination can lead to serious, potentially life-threatening conditions such as serotonin syndrome .
Liver Disease and Hepatic Impairment
Patients with liver disease resulting in hepatic impairment should avoid using Cymbalta. The drug's metabolism can be significantly affected in these individuals, leading to increased risk of adverse effects .
Severe Renal Impairment
Cymbalta is contraindicated in patients with severe renal impairment, defined as a creatinine clearance of less than 30 ml/min. The drug's clearance is reduced in these patients, which can lead to toxicity .
Use with Potent CYP1A2 Inhibitors
The use of potent inhibitors of the enzyme CYP1A2, such as fluvoxamine, ciprofloxacin, and enoxacin, is contraindicated with Cymbalta. These inhibitors can increase the plasma concentration of duloxetine, leading to heightened risk of adverse effects 12.
Pregnancy and Breastfeeding
Cymbalta should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Breastfeeding is not recommended while taking Cymbalta, as the drug can be excreted in breast milk and may harm the nursing infant .
Pediatric and Elderly Populations
The use of Cymbalta in children or adolescents is not recommended due to insufficient data on safety and efficacy. Similarly, use in the very elderly population (over 75 years) is not recommended until more efficacy data are available 12.
History of Mania, Bipolar Disorder, or Seizures
Patients with a history of mania, bipolar disorder, or seizures should use Cymbalta with caution. The drug can exacerbate these conditions, leading to severe adverse effects .
Increased Intra-Ocular Pressure
Cymbalta should be used with caution in patients with increased intra-ocular pressure or those at risk of acute narrow-angle glaucoma. The drug can exacerbate these conditions .
Hypertension and Cardiac Disease
Patients with known hypertension and/or other cardiac diseases should have their blood pressure monitored regularly while on Cymbalta. The drug can cause increases in blood pressure, which may be problematic for these patients .
Concomitant Use with Contraindicated Drugs
Concomitant use of Cymbalta with certain drugs can lead to serious adverse effects. For instance, combining duloxetine with SSRIs, venlafaxine, or other serotonergic drugs can increase the risk of serotonin syndrome. Additionally, the use of metoclopramide with duloxetine is contraindicated due to the risk of adverse interactions 23.
Conclusion
Cymbalta (duloxetine) has several contraindications that must be carefully considered before prescribing. These include hypersensitivity to its components, combination with MAOIs, liver disease, severe renal impairment, use with potent CYP1A2 inhibitors, and specific conditions such as pregnancy, breastfeeding, and certain psychiatric and ocular conditions. Monitoring and caution are essential to ensure patient safety and efficacy of the treatment.
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