I think you can but check as long as he is not on anything else that interfares with it ?
maybe you could leave it an extra day ? but not more then 48 hours then go back to the right day ??????but double check .
i have taking it with a cold but was not on anything else .Some will say no some yes .So check .
if in doubt do take it as one week with out is not going to hurt it stays around in blood for 6 weeks .
christine
The chocolate eating housewife ...The washer woman .....naughty lady