To :Laura Walker Re :Typhoid vaccine, cholera vaccine, Atenolol Typhoid vaccine is a live attenuated bacterial culture of a specific strain of typhoid. Although there are no indications for use or studies in breastfeeding mothers, the vaccine is cleared for use in infants down to the age of 6 months. Being bacterial, I would doubt its entry into breastmilk nor any major complications in a breastfeeding infant. It would not be advisable, obviously, to use in an mother/infant pair who are ill, or immunocompromised in any way. As for cholera vaccine, it is a phenol killed bacterial vaccine that can actually boost the anticholera immunoglobulins secreted into milk. It is also used in infants down to 6 months of age. It is unlikely to adversely effect a breastfeeding infant. As for using Tenormin (atenolol) in breastfeeding mothers. I am somewhat nervous about this product as several cases of bradycardia and cyanosis have been reported. It appears highly variable. Perhaps the physician would consider changing to Inderol (propranolol), which is quite effective, and produces very poor milk levels. Regards Tom Hale, Ph.D.