 [ Symptoms ] can i take a benadryl tablet while on doxycycline hyclate  is it safe to take a benadryl tablet while i am on doxycycline hyclate [ Disease ] hi the best way to find out of your pregnant is a doctors test htp is are just a guide but found you this good forum that should really help lots of answers for help its all women so you will love it <link> just copy into google to the www to open and read do hope this helps you good luck