I need to do a combination treatment of my drugs, however, the route of administration is different. One is by oral gavage and the other by i.p. injection. Could you please advise whether it is ok to do drug administration at the same time? Or is it better to do the oral gavage in the morning and then i.p. in the afternoon? I am intending to do this on C57Bl/6 mice. Appreciate your suggestion.