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Drug Interactions between Focalin XR and propranolol

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

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Interactions between your drugs

Moderate

propranolol dexmethylphenidate

Applies to: propranolol and Focalin XR (dexmethylphenidate)

MONITOR: Methylphenidate and other derivative amphetamines may decrease the therapeutic effects of antihypertensive drugs. According to serdexmethylphenidate label information, CNS stimulants cause a mean increase in blood pressure of approximately 2 to 4 mmHg and a mean increase in heart rate of approximately 3 to 6 beats per minute. With some individuals having larger increases.

MANAGEMENT: Caution and monitoring of blood pressure is recommended if methylphenidate, dexmethylphenidate or serdexmethylphenidate are administered with antihypertensives agents such as: potassium-sparing and thiazide diuretics, calcium channel blockers, angiotensin-converting-enzyme (ACE) inhibitors, angiotensin II receptor blockers (ARBs), beta blockers or centrally acting alpha-2 receptor agonists. The dosage of the antihypertensive drug should be adjusted as needed.

References

  1. (2001) "Product Information. Ritalin (methylphenidate)." Novartis Pharmaceuticals
  2. (2022) "Product Information. Metadate CD (methylphenidate)." Celltech Pharmaceuticals Inc
  3. (2001) "Product Information. Focalin (dexmethylphenidate)." Mikart Inc
  4. (2002) "Product Information. Metadate ER (methylphenidate)." Celltech Pharmaceuticals Inc
  5. Cerner Multum, Inc. "UK Summary of Product Characteristics."
  6. Cerner Multum, Inc. "Australian Product Information."
  7. (2013) "Product Information. Ritalin LA (methylphenidate)." Quality Care Products/Lake Erie Medical
  8. (2021) "Product Information. Azstarys (dexmethylphenidate-serdexmethylphenidate)." Corium, Inc.
View all 8 references

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Drug and food interactions

Moderate

propranolol food

Applies to: propranolol

ADJUST DOSING INTERVAL: The bioavailability of propranolol may be enhanced by food.

MANAGEMENT: Patients may be instructed to take propranolol at the same time each day, preferably with or immediately following meals.

References

  1. Olanoff LS, Walle T, Cowart TD, et al. (1986) "Food effects on propranolol systemic and oral clearance: support for a blood flow hypothesis." Clin Pharmacol Ther, 40, p. 408-14
  2. Byrne AJ, McNeil JJ, Harrison PM, Louis W, Tonkin AM, McLean AJ (1984) "Stable oral availability of sustained release propranolol when co-administered with hydralazine or food: evidence implicating substrate delivery rate as a determinant of presystemic drug interactions." Br J Clin Pharmacol, 17, s45-50

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Moderate

propranolol food

Applies to: propranolol

ADJUST DOSING INTERVAL: Concurrent administration with calcium salts may decrease the oral bioavailability of atenolol and possibly other beta-blockers. The exact mechanism of interaction is unknown. In six healthy subjects, calcium 500 mg (as lactate, carbonate, and gluconate) reduced the mean peak plasma concentration (Cmax) and area under the concentration-time curve (AUC) of atenolol (100 mg) by 51% and 32%, respectively. The elimination half-life increased by 44%. Twelve hours after the combination, beta-blocking activity (as indicated by inhibition of exercise tachycardia) was reduced compared to that with atenolol alone. However, during a 4-week treatment in six hypertensive patients, there was no difference in blood pressure values between treatments. The investigators suggest that prolongation of the elimination half-life induced by calcium coadministration may have led to atenolol cumulation during long-term dosing, which compensated for the reduced bioavailability.

MANAGEMENT: It may help to separate the administration times of beta-blockers and calcium products by at least 2 hours. Patients should be monitored for potentially diminished beta-blocking effects following the addition of calcium therapy.

References

  1. Kirch W, Schafer-Korting M, Axthelm T, Kohler H, Mutschler E (1981) "Interaction of atenolol with furosemide and calcium and aluminum salts." Clin Pharmacol Ther, 30, p. 429-35

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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

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

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