Theoretically, it is possible that diphenhydramine could affect a woman's milk supply, since the medication can suppress prolactin (a hormone important for breast milk production). However, this is probably not an issue for women who are well-established with breastfeeding.
PRO is a strategic communications firm helping high profile individuals, professional teams, national governing bodies, corporations and non-profits within the sports industry build their brands through the media.
professional. 1  of, engaged in, or worthy of the high standards of a profession. 2  designating or of a school, esp. a graduate school, offering instruction in a profession. 3  earning one's living from an activity, such as a sport, not normally thought of as an occupation. 4  engaged in by professional players: professional hockey.