Diarrhea in very early pregnancy is a result of the rising hormone levels, predominantly progesterone. Since extended periods of diarrhea can cause weakness and dehydration it is best to seek medical advice if it persists.iarrhea in very early pregnancy is a result of the rising hormone levels, predominantly progesterone. Since extended periods of diarrhea can cause weakness and dehydration it is best to seek medical advice if it persists.
The recommended dosage of Benadryl for treating allergy or common cold symptoms in adults and children ages 12 years and older is 25 to 50 mg every four to six hours.
Doctors usually recommend taking a 25mg to 50mg oral dose once every six hours [11] in the first trimester, while the dosage should not generally exceed 25mg in six hours during the last two trimesters [6, 7] . Use of topical Benadryl is considered safe in pregnancy as there is little evidence of harm to the fetus.