Drug interactions
Betaxolol + Carbidopa-levodopa
Severity: Moderate
Betaxolol and Carbidopa-levodopa: 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
Levodopa can cause orthostatic hypotension, and beta-blockers such as betaxolol add to the blood pressure lowering effect. Patients may develop dizziness, falls or syncope, especially when levodopa is started or increased.
What this interaction means in plain words
Betaxolol and Carbidopa-levodopa 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.
Betaxolol belongs to Cardiovascular; Carbidopa-levodopa belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic hypotensive effects, as levodopa-derived dopamine causes vasodilation and autonomic effects.
What to do
Monitor standing and sitting blood pressure when starting or titrating levodopa. Reduce the antihypertensive dose if symptomatic orthostatic hypotension develops.
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 Carbidopa-levodopa
- Carbidopa-levodopa + Isocarboxazid Contraindicated
- Carbidopa-levodopa + Phenelzine Contraindicated
- Carbidopa-levodopa + Selegiline transdermal Contraindicated
- Carbidopa-levodopa + Tranylcypromine Contraindicated
- Amisulpride + Carbidopa-levodopa Major
- Asenapine + Carbidopa-levodopa Major
Other interactions of Betaxolol
- Acebutolol + Betaxolol Major
- Aldesleukin + Betaxolol Major
- Amifostine + Betaxolol Major
- Amiodarone + Betaxolol Major
- Atenolol-chlorthalidone + Betaxolol Major
- Atenolol + Betaxolol Major
Frequently asked questions
Can I take Betaxolol with Carbidopa-levodopa?
MediHelp rates the interaction as moderate. Betaxolol and Carbidopa-levodopa 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. Levodopa can cause orthostatic hypotension, and beta-blockers such as betaxolol add to the blood pressure lowering effect. Patients may develop dizziness, falls or syncope, especially when levodopa is started or increased.
How serious is the interaction between Betaxolol and Carbidopa-levodopa?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor standing and sitting blood pressure when starting or titrating levodopa. Reduce the antihypertensive dose if symptomatic orthostatic hypotension develops.
What other medicines interact with Carbidopa-levodopa?
MediHelp also lists interactions of Carbidopa-levodopa with, for example, Isocarboxazid, Phenelzine, Selegiline transdermal. The full list is on the Carbidopa-levodopa page.
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