My 8 month old LO having diarrhoea since last week.

My LO having diarrhoea since last week. Visited PD and he gave probiotics and a Smecta (anti-diarrhoea). Which i fed a 2 days but yet the diarrhoea still persist. LO majority poo every feed and in-between feeds. One day can change about 7-8 times or more. Diaper rashes occured very easily since LO will poo anytime. Any other things I can do to help to stop or improve LO condition? Otherwise she always gets diaper rashes at infant care. She drinks and eat normally so we can ensure that she will not be dehydrated. (We also sent her stool to PD for testing and waiting for the outcome)