Interactions with Drugs
Whey protein may lower blood sugar levels. Caution is advised when using medications that may also lower blood sugar. People taking drugs for diabetes by mouth or insulin should be monitored closely by a qualified healthcare professional, including a pharmacist. Medication adjustments may be necessary.
Whey protein may cause low blood pressure. Caution is advised in people taking drugs that lower blood pressure.
Whey protein may increase the risk of bleeding when taken with drugs that increase the risk of bleeding. Some examples include aspirin, anticoagulants ("blood thinners") such as warfarin (Coumadin®) or heparin, anti-platelet drugs such as clopidogrel (Plavix®), and non-steroidal anti-inflammatory drugs such as ibuprofen (Motrin®, Advil®) or naproxen (Naprosyn®, Aleve®).
Whey protein may interfere with the way the body processes certain drugs using the liver's "cytochrome P450" enzyme system. As a result, the levels of these drugs may be altered in the blood, and may cause altered effects or potentially serious adverse reactions. People using any medications should check the package insert, and speak with a qualified healthcare professional, including a pharmacist, about possible interactions.
Whey protein may also interact with agents that affect appetite, agents that affect blood vessel width, agents that affect the immune system, agents that promote breast milk, agents that treat abnormal heart rhythms, agents that treat parasites or worms, albendazole, alcohol, alendronate, anti-allergy agents, antibiotics, anticancer agents, anti-inflammatory agents, antiulcer agents, antiviral agents, bone agents, cholesterol-lowering agents, dental agents, fertility agents, heart agents, hormonal agents, indomethacin, iron salts, kidney agents, levodopa, liver agents, lung agents, mood-altering agents, musculoskeletal agents, nervous system agents, pain relievers, performance enhancement agents, skin agents, stomach and intestine agents, weight loss agents, and wound-healing agents.
Interactions with Herbs and Dietary Supplements
Whey protein may lower blood sugar levels. Caution is advised when using herbs or supplements that may also lower blood sugar. Blood glucose levels may require monitoring, and doses may need adjustment.
Whey protein may cause low blood pressure. Caution is advised in people taking herbs or supplements that lower blood pressure.
Whey protein may increase the risk of bleeding when taken with herbs and supplements that are believed to increase the risk of bleeding. Multiple cases of bleeding have been reported with the use of Ginkgo biloba, and fewer cases with garlic and saw palmetto. Numerous other agents may theoretically increase the risk of bleeding, although this has not been proven in most cases.
Whey protein may interfere with the way the body processes certain herbs or supplements using the liver's "cytochrome P450" enzyme system. As a result, the levels of other herbs or supplements may be altered in the blood. It may also alter the effects that other herbs or supplements possibly have on the P450 system.
Whey protein may also interact with amino acids, anti-allergy herbs and supplements, antibacterials, anticancer herbs and supplements, anti-inflammatory herbs and supplements, antioxidants, antiulcer herbs and supplements, antiviral herbs and supplements, bone herbs and supplements, calcium, cholesterol-lowering herbs and supplements, colostrum, copper, creatine, dental herbs and supplements, fertility herbs and supplements, folic acid, fructooligosaccharides, herbs and supplements used for the heart, herbs and supplements that affect appetite, herbs and supplements that affect blood vessel width, herbs and supplements that affect the immune system, herbs and supplements that promote breast milk, herbs and supplements that treat abnormal heart rhythms, herbs and supplements that treat parasites or worms, hormonal herbs and supplements, iron, kidney herbs and supplements, leucine, limonene, liver herbs and supplements, lung herbs and supplements, maltodextrin, mood-altering herbs and supplements, musculoskeletal herbs and supplements, nervous system herbs and supplements, omega-3 fatty acids, pain relievers, performance enhancement herbs and supplements, probiotics, selenium, skin herbs and supplements, soy, spirulina, stomach and intestine herbs and supplements, vitamins, weight loss herbs and supplements, wound-healing herbs and supplements, and zinc.
This evidence-based monograph was prepared by The Natural Standard Research Collaboration