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Drug Interactions between C-Topical Solution and Metadate CD

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

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Interactions between your drugs

Major

methylphenidate cocaine topical

Applies to: Metadate CD (methylphenidate) and C-Topical Solution (cocaine topical)

GENERALLY AVOID: Concomitant use of cocaine with sympathomimetic agents such as epinephrine and phenylephrine may lead to additive cardiovascular effects. The proposed mechanism involves increased circulating catecholamines and increased activity of the sympathetic nervous system. Locally administered cocaine and epinephrine have been used in combination during septal surgery; however, concerns regarding cardiovascular side effects have been raised. Myocardial ischemia, myocardial infarction, and ventricular arrhythmias have been reported following coadministration of topical intranasal cocaine with epinephrine and phenylephrine during nasal and sinus surgery. Cases documenting the development of arrhythmias after the nasal application of cocaine and epinephrine 25%-0.18% topical paste have also been reported in 2 children and one adult receiving general anesthesia. However, the dosage of cocaine administered in these cases was above the maximum recommended dose in fit adults (1.5 mg/kg).

MANAGEMENT: Concomitant use of cocaine with sympathomimetic agents should be avoided. If coadministration is required, prolonged vital sign and ECG monitoring may be necessary.

References

  1. (2022) "Product Information. Adrenalin (EPINEPHrine)." Apothecon Inc
  2. Nicholson K, Rogers J (1995) "Cocaine and adrenaline paste: a fatal combination?" Br Med J, 311, p. 250-1
  3. (2003) "Product Information. Cocaine Hydrochloride (cocaine topical)." Mallinckrodt Medical Inc
  4. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  5. (2018) "Product Information. Cocaine Hydrochloride Nasal (cocaine nasal)." Genus Lifesciences Inc.
  6. Thevasagyam M, Jindal M, Allsop P, Oates J (2007) "Does epinephrine infiltration in septoplasty make any difference?" Eur Arch Otorhinolaryngol, 264, p. 1175-8
  7. Kara CO, Kaftan A, Atalay H, Pinar HS, Ogmen G (2001) "Cardiovascular safety of cocaine anaesthesia in the presence of adrenaline during septal surger." J Otolaryngol, 30, p. 145-8
View all 7 references

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Drug and food interactions

Moderate

methylphenidate food

Applies to: Metadate CD (methylphenidate)

GENERALLY AVOID: Alcohol may exacerbate the adverse central nervous system effects of psychoactive drugs, including methylphenidate.

GENERALLY AVOID: Consumption of alcohol while taking certain sustained-release formulations of methylphenidate may cause rapid release of the drug, resulting in increased systemic levels of methylphenidate. In vitro studies have been conducted using Metadate CD 60 mg and Ritalin LA 40 mg capsules, as well as Concerta 18 mg tablet. At an alcohol concentration of 40%, an increase in the release rate of methylphenidate was observed in the first hour for Metadate CD and Ritalin LA, resulting in 84% and 98% of the methylphenidate being released, respectively. In contrast, there was no increased release of methylphenidate in the first hour for Concerta. These results are considered to be representative of the other available strengths of the corresponding product.

MANAGEMENT: Patients treated with methylphenidate should be advised to avoid alcohol or medications that contain alcohol.

References

  1. (2022) "Product Information. Metadate CD (methylphenidate)." Celltech Pharmaceuticals Inc
  2. (2002) "Product Information. Concerta (methylphenidate)." Alza
  3. (2013) "Product Information. Ritalin LA (methylphenidate)." Quality Care Products/Lake Erie Medical

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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.

See also

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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

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