My 2 Year Accidentally Took My Lisinopril 1 Pill Bit

My 2 year accidentally took my lisinopril 1 pill bit into it but spit it out i wash her mouth out and gave her a bottle of water and apple juice after that she laid down and went to sleep should i let her sleep if so how it was about 11am its 1:40 now as i text how long should i let her sleep