Q: As an extraordinary minister of holy communion, may I administer viaticum to the dying? And if I do it, may a priest administer it again later? Oh, and if I have one host left when I bring communion to the sick, may I consume it?
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A: An extraordinary minister of holy communion may indeed administer viaticum to the dying. The Church is anxious to share communion under those circumstances, so permissions are broad.
Yes, a priest may administer viaticum again later, and so may you. But it’s a good idea to keep the pastor informed, so he knows what is going on.
Yes, when administering communion outside Mass, the minister may join the reception of communion. In the case of bringing communion to the sick, it would be best to do it during the ritual after giving the last person communion.
Here’s an earlier post: https://paulturner.org/viaticum/