As with all prescription medications, inform your prescribing doctor about any medical conditions you have and any medications and supplements you are currently taking before starting treatment with terbinafine. This drug can interact with other medicines and substances, leading to potentially serious side effects.
You should tell your provider if you are taking:
Warfarin and Other Blood Thinners: Terbinafine may increase the effects of blood thinners like warfarin, leading to an increased risk of bleeding.
Selective Serotonin Reuptake Inhibitors (SSRIs): Some SSRIs, such as fluoxetine and paroxetine, can interact with terbinafine, potentially leading to an increased risk of side effects.
Tricyclic Antidepressants (TCAs): TCAs, like amitriptyline and nortriptyline, may interact with terbinafine and increase the risk of side effects.
Beta-Blockers: Terbinafine may enhance beta-blockers’ effects, potentially causing bradycardia (slow heart rate) or other cardiovascular issues.
Calcium Channel Blockers: Terbinafine may interact with calcium channel blockers, potentially leading to blood pressure or heart rhythm changes.
Cimetidine: Cimetidine, a medication used to treat stomach ulcers and acid reflux, may increase terbinafine levels in the blood.
Rifampin: Rifampin, an antibiotic, may decrease the levels of terbinafine in the blood, reducing its effectiveness.
Antidepressants and Antipsychotics: Some antidepressants and antipsychotic medications may interact with terbinafine, potentially leading to an increased risk of side effects.
This is not a complete list of all drugs that interact with terbinafine. Make a comprehensive list of all medicines and supplements that you take before starting treatment with this drug.
You should also tell your health care provider about any medical conditions you manage.
Let your doctor know if you are pregnant or plan on becoming pregnant before starting treatment with terbinafine. If you become pregnant while taking this medication, stop taking it and inform your health care provider immediately.