Drug interactions
Timolol + Tizanidine
Severity: Moderate
Timolol and Tizanidine: 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
Oral timolol and tizanidine both lower blood pressure and heart rate, so combined use may cause hypotension and bradycardia. Ophthalmic timolol also has systemic absorption that can contribute in susceptible patients.
What this interaction means in plain words
Timolol and Tizanidine 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.
Timolol belongs to Cardiovascular; Tizanidine belongs to Musculoskeletal.
Why it happens
Additive pharmacodynamic effects of central alpha-2 agonism and nonselective beta blockade.
What to do
Monitor blood pressure and heart rate when starting or adjusting either drug. Reduce the dose of one agent if symptomatic hypotension or bradycardia occurs.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Timolol and Tizanidine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Tizanidine
- Ciprofloxacin + Tizanidine Contraindicated
- Fluvoxamine + Tizanidine Contraindicated
- Pefloxacin + Tizanidine Contraindicated
- Pipemidic acid + Tizanidine Contraindicated
- Benzhydrocodone / acetaminophen + Tizanidine Major
- Brexanolone + Tizanidine Major
Other interactions of Timolol
- Acebutolol + Timolol Major
- Albuterol + Timolol Major
- Aldesleukin + Timolol Major
- Amifostine + Timolol Major
- Amiodarone + Timolol Major
- Arformoterol + Timolol Major
Frequently asked questions
Can I take Timolol with Tizanidine?
MediHelp rates the interaction as moderate. Timolol and Tizanidine 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. Oral timolol and tizanidine both lower blood pressure and heart rate, so combined use may cause hypotension and bradycardia. Ophthalmic timolol also has systemic absorption that can contribute in susceptible patients.
How serious is the interaction between Timolol and Tizanidine?
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 blood pressure and heart rate when starting or adjusting either drug. Reduce the dose of one agent if symptomatic hypotension or bradycardia occurs.
What other medicines interact with Tizanidine?
MediHelp also lists interactions of Tizanidine with, for example, Ciprofloxacin, Fluvoxamine, Pefloxacin. The full list is on the Tizanidine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
