the blessing which is part of the sacrament does indeed confer a plenary indulgence, from the Apostolic norms for indulgences
n.18*—*To the faithful in danger of death who cannot be assisted by apriest to bring them the sacraments and impart the apostolic blessingwith its attendant plenary indulgence (according to canon 468, para. 2 ofthe Code of Canon Law) Holy Mother Church nevertheless grants a plenaryindulgence to be acquired at the point of death, provided they areproperly disposed and have been in the habit of reciting some prayersduring their lifetime. To use a crucifix or cross in connection with theacquisition of this plenary indulgence is a laudable practice.
This plenary indulgence at the point of death can be acquired by thefaithful even if they have already obtained another plenary indulgence onthe same day.
I already quoted fruits of the sacrament don’t know where it went, give me a minute
Here is a brief summary of what the Catechism of the Catholic Church
teaches about this sacrament; the link will take you to the whole section of the CCC about it:
1527 The sacrament of Anointing of the Sick has as its purpose the conferral of a special grace on the Christian experiencing the difficulties inherent in the condition of grave illness or old age.
1528 The proper time for receiving this holy anointing has certainly arrived when the believer begins to be in danger of death because of illness or old age.
1529 Each time a Christian falls seriously ill, he may receive the Anointing of the Sick, and also when, after he has received it, the illness worsens.
1532 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.