Vitamin B1 Thiamin Drug and Food Interactions

Vitamin B1 Thiamin Drug and Food Interactions

Thiamin is known to interact with other medications and substances. The following table describes some of these interactions. If you have any questions about whether it would be advisable to adjust either your thiamin intake or the doses of any medications based on this information, be sure to consult your doctor.
 

Medication or Substance                              Interactive Effect

 
Antibiotics                                                      Decrease blood levels of thiamin
 
Oral Contraceptives                                      Decrease blood levels of thiamin
 
Muscle relaxants administered                      Excessive muscle relaxation
during surgery
 
Carbonate and citrate additives                    Decrease effectiveness of thiamin
to foods and beverages
 
Diuretics                                                        Interfere with absorption of thiamin
 
Coffee or tea (excessive amounts) 
Interferes with absorption of thiamin           
 
Tobacco                                                         Interferes with absorption of thiamin
 
Alcohol                                                           Interferes with absorption of thiamin