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Drug Interactions between Prilosec and riociguat

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

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Interactions between your drugs

Moderate

omeprazole riociguat

Applies to: Prilosec (omeprazole) and riociguat

MONITOR: Coadministration of riociguat with proton pump inhibitors may reduce its gastrointestinal absorption. Riociguat exhibits pH-dependent solubility, with increased solubility at lower pH. According to the product labeling, administration of riociguat with omeprazole resulted in decreases of riociguat peak plasma concentration (Cmax) and systemic exposure (AUC) by approximately 30% and 25%, respectively. The Cmax and AUC of the active metabolite, M1, which has 1/3 to 1/10 the pharmacologic activity of riociguat, were not significantly affected.

MANAGEMENT: No dosage adjustment for riociguat is recommended when coadministered with proton pump inhibitors. However, patients should be monitored for potentially diminished therapeutic effects of riociguat.

References (1)
  1. (2013) "Product Information. Adempas (riociguat)." Bayer Pharmaceutical Inc

Drug and food interactions

Moderate

riociguat food

Applies to: riociguat

ADJUST DOSE: Smoking may decrease the plasma concentrations of riociguat. The proposed mechanism is induction of the CYP450 1A1-mediated metabolism of riociguat by polycyclic aromatic hydrocarbons present in cigarette smoke. CYP450 1A1 is responsible for the formation of the major active metabolite, M1, which has just 1/3 to 1/10 the pharmacologic activity of riociguat. According to the product labeling, plasma concentrations of riociguat are reduced by 50% to 60% in smokers compared to nonsmokers.

MANAGEMENT: Patients should be advised to stop smoking. Riociguat dosages higher than 2.5 mg three times a day may be considered in cigarette smokers, if tolerated, to match the exposure seen in nonsmoking patients. However, safety and effectiveness of higher dosages have not been established. A dosage reduction should be considered in patients who stop smoking during treatment with riociguat. The tablet form of riociguat can generally be taken with or without food. Some authorities recommend not to switch between fed and fasted riociguat intake because of increased peak plasma levels of riociguat in the fasting compared to the fed state.

References (3)
  1. (2013) "Product Information. Adempas (riociguat)." Bayer Pharmaceutical Inc
  2. (2023) "Product Information. Adempas (riociguat)." Merck Sharp & Dohme (UK) Ltd
  3. (2014) "Product Information. Adempas (riociguat)." Bayer Australia Limited

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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