1. The maximum rate that you can push lorazepam is 2mg/minute. And incidentally, it must be diluted with an equal volume of NS before pushing it. So if you have 1mL of lorazepam to give, you need to dilute it in at least 1mL of NS before pushing it.
2. Ibuprofen is not an anti-pyretic, so do you think this is an appropriate pharmacological intervention for someone with a fever?
3. First of all, you have to give the medication via the route that it was ordered. If you want to give it by another route, your provider must change the order to reflect the new route of administration. Like others said, it's not your call. However, if they do decide to give the furosemide IM, consider ADME (absorption, distribution, metabolism, excretion) with respect to that route of administration. Would absorption be different when giving the med IV vs. IM?