Interactions with Drugs
Thiamine may cause low blood pressure. Caution is advised in people taking drugs that lower blood pressure.
Caution is advised when using medications that 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.
Thiamine may also interact with agents that affect the immune system, agents that enhance athletic performance, agents that promote urination, agents that treat retrovirus infections (HIV), agents that widen blood vessels, agents used for heart disorders, alcohol, Alzheimer's agents, antacids, antibiotics, anticancer agents, barbiturates, birth control taken by mouth, dextrose, dichloroacetate, flumazenil, heart rate-regulating agents, ifosfamide, metformin, naloxone, nervous system agents, neuromuscular blocking agents, pain relievers, phenytoin, thyroid hormone, tobacco, and weight loss agents.
Interactions with Herbs and Dietary Supplements
Caution is advised when using herbs or supplements that may lower blood sugar. Blood glucose levels may require monitoring, and doses may need adjustment.
Thiamine may cause low blood pressure. Caution is advised in people taking herbs or supplements that lower blood pressure.
Thiamine may also interact with Alzheimer's herbs and supplements, antacids, antibacterials, anticancer herbs and supplements, benfotiamine, betel nuts, birth control taken by mouth, heart rate-regulating herbs and supplements, herbs and supplements that affect the immune system, herbs and supplements that enhance athletic performance, herbs and supplements that promote urination, herbs and supplements that widen blood vessels, herbs and supplements used for heart disorders, horsetail, nervous system herbs and supplements, neuromuscular herbs and supplements, pain relievers, polyphenols, sedatives, thyroid herbs and supplements, tobacco, vitamins, and weight loss herbs and supplements.
This evidence-based monograph was prepared by The Natural Standard Research Collaboration