Drug interactions
Dexamethasone-tobramycin + Tadalafil
Severity: Moderate
Dexamethasone-tobramycin and Tadalafil: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Dexamethasone may reduce tadalafil exposure via CYP3A4 induction, possibly reducing efficacy. This matters most in pulmonary arterial hypertension, where loss of effect has clinical consequences.
What this interaction means in plain words
Dexamethasone-tobramycin and Tadalafil can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Dexamethasone-tobramycin belongs to Anti Bacterial; Tadalafil belongs to Genitourinary.
Why it happens
Dexamethasone induces CYP3A4, increasing tadalafil clearance.
What to do
In pulmonary hypertension monitor symptoms and exercise capacity during prolonged dexamethasone therapy. For erectile dysfunction, monitor response and adjust the dose.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Dexamethasone-tobramycin
Other interactions of Tadalafil
- Amyl nitrite + Tadalafil Contraindicated
- Isosorbide dinitrate + Tadalafil Contraindicated
- Isosorbide mononitrate + Tadalafil Contraindicated
- Nitroglycerin po + Tadalafil Contraindicated
- Nitroglycerin rectal + Tadalafil Contraindicated
- Nitroglycerin sublingual + Tadalafil Contraindicated
Frequently asked questions
Can I take Dexamethasone-tobramycin with Tadalafil?
MediHelp rates the interaction as moderate. Dexamethasone-tobramycin and Tadalafil can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Dexamethasone may reduce tadalafil exposure via CYP3A4 induction, possibly reducing efficacy. This matters most in pulmonary arterial hypertension, where loss of effect has clinical consequences.
How serious is the interaction between Dexamethasone-tobramycin and Tadalafil?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: In pulmonary hypertension monitor symptoms and exercise capacity during prolonged dexamethasone therapy. For erectile dysfunction, monitor response and adjust the dose.
What other medicines interact with Dexamethasone-tobramycin?
MediHelp also lists interactions of Dexamethasone-tobramycin with, for example, Capreomycin, Carboplatin, Ciprofloxacin. The full list is on the Dexamethasone-tobramycin page.
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