Ultiva is a pain medicine containing remifentanil that works very quickly for a short time.
Your doctor will decide your exact dose, as it depends on your specific needs and the procedure.
Ultiva is given as a single injection into a vein or as a continuous, slow infusion into a vein over a longer period.
Your doctor will decide your maximum dose based on your needs and constant monitoring; it is not usually given for more than 3 days in intensive care.