Anointing of the Sick uses the Oil of the Sick, which has been blessed by the bishop at the Chrism Mass. Contrary to popular belief, this is not just for people who are dying. It offers special graces for the soul, many of which aid in enduring unavoidable suffering, so it is appropriate for anyone who is in danger of illness.
"The special grace of the sacrament of the Anointing of the Sick has as its effects: the uniting of the sick person to the passion of Christ, for his own good and that of the whole Church; the strengthening, peace, and courage to endure in a Christian manner the sufferings of illness or old age; the forgiveness of sins, if the sick person was not able to obtain it through the sacrament of penance; the restoration of health, if it is conducive to the salvation of his soul; the preparation for passing over to eternal life." - Catechism of the Catholic Church 1532