Propecia Drug Interactions
Propecia is not known to cause major drug interactions although it can potentially interact with other medications. Clinical studies that evaluate the effects of finasteride on medications linked with cytochrome P450 metabolic pathway do not show significant drug interactions. No clinically significant adverse effects were noted when finasteride was tested with cytochrome P450-linked medications that include propanolol, digoxin, antipyrine, warfarin, and theophyilline.
Although there are no specific clinical studies that evaluate the effects of Propecia on some drugs, finasteride 1 mg is generally considered compatible with common medications such as beta-blockers, cardiac nitrates, calcium-channel blockers, diuretics, anticonvulsants, anti-infectives, NSAIDs, acetaminophen, and others.
However, it is possible that there are some medications may actually interact with Propecia but are not yet known. Therefore, people taking this medication should consult their healthcare provider or pharmacist about the drugs they normally take. Do not start taking any new medications without consulting your doctor. Tell your healthcare provider or prescriber about all medications you take, including prescription, non-prescription, and natural health products. It is best to keep a list of all health products you take and share it with your doctor. Since other substances such as cigarettes, alcohol, nicotine and street drugs may also affect certain medications, it is best to discuss use of these substances with your healthcare provider.
If you develop any new symptom when combining Propecia with other drugs, contact your healthcare provider right away. Depending on the severity of the side effects, your doctor may consider stopping or changing one of the medications, changing the dosing schedule, or discontinuing treatment with Propecia.
Take note, however, that not all drug interactions require stopping one or all of the medications. Usually, dose adjustments and changes in dosing schedule is enough to manage drug interactions.