Nonsteroidal anti-inflammatory drugs may negate the usefulness of feverfew in the treatment of migraine headaches.
- Arch Intern Med 1998 Nov 9;158(20):2200-11 -- Herbal medicinals: selected clinical considerations focusing on known or potential drug-herb interactions. -- Miller LG.
Feverfew may increase the risk of bleeding or potentiate the effects of warfarin therapy.
- Am J Health Syst Pharm 2000 Jul 1;57(13):1221-7; quiz 1228-30 --
Potential interactions between alternative therapies and warfarin. -- Heck AM, DeWitt BA, Lukes AL.