Caffeine does pass from the mother's milk to the baby and can
cause agitation and sleeplessness in infants much as it does in
adults. The dose effects of caffeine may differ from one mother-
infant pair to another based on several factors. First, the
amount of caffeine the mother drinks: Coffee has the highest
amount of caffeine, then black tea, and then caffeinated soft
drinks much less. Most babies do fine when their mother drinks
one or two caffeine drinks a day, but some infants start showing
symptoms of sleeplessness when their mother drinks four to six
caffeine drinks a day. Secondly, although only one to 10 percent
of the caffeine that the mother drinks ends up in her breast
milk, young babies tend to store caffeine in their bodies.
Infants may begin to show the symptoms of caffeine effect within
hours after their mother drinks caffeine, and the symptoms may
last for days. Babies over 4 months of age are better able to
break down caffeine, so the symptoms may not last as long. To
answer your question sp