Sorry this sounds like a very dumb question as of course judging by the name of it 300mg is much bigger than 75mg ones!! Reason for asking is that I should be taking the very low dose 75mg ones while pregnant but I suddenly found a bunch of 300mg ones in same drawer as well so really panicked - I was very sure I had been taking the very tiny ones and the 300mg ones I have are much bigger. so hopefully had not been overdose without knowing??