Add punctuation: Vitamin E take 400 ie daily If there is swelling raise the dose to 800 ie daily for up to six weeks
A: Vitamin E: take 400 i.e. daily. If there is swelling, raise the dose to 800 i.e. daily for up to six weeks.

Add punctuation: The four sites were selected because they have different types of metal contamination
A: The four sites were selected because they have different types of metal contamination.

Add punctuation: Waiting to become groggy or to dope off feel tired sleepy or foggy as though doped or drugged as the only detection of misunderstood words before handling is waiting too long
A:
Waiting to become groggy or to "dope off" (feel tired, sleepy or foggy as though doped or drugged) as the only detection of misunderstood words before handling is waiting too long.