Also incorrect; you must rotate once a week and 5ml is the maximum regardless of how big someone is and that is in the glute, the more you inject the higher your chances of absesses and infections. 3ml is the maximum even a doctor would administer for cancer patients.

http://www.oncologynurseadvisor.com/large-volume-im-injections-a-review-...

quoted

IM injections are administered in five potential sites: deltoid (commonly used for adult vaccinations), dorsogluteal, ventrogluteal, rectus femoris, and vastus lateralis3,10,11 (Figure 1). Maximum volumes have been proposed across the various IM sites for adult patients3,12-16 (Table 1). Overall, 5 mL has been cited for adults as the maximum volume for a single IM injection, with lower maximums proposed for adult patients with less-developed or small muscle mass.3,13,14 


what they show in the article is the glute muscle

here is another article that says you should not do 5ml at once but split it into 2 2.5ml and use 2 different sites

http://www.brooksidepress.org/Products/Administer_IM_SQ_and_ID_Injection...

quoted:

(c) Remember, if an injection is given outside of the upper outer quadrant, irreparable injury may be done to the sciatic nerve or the needle may penetrate the gluteal artery and this can cause significant bleeding from the vessel.

(d) If 5 cc is to be given, the medication should be divided into 2 doses and injected into separate sites with a maximum of 2.5 cc per dose.

(e) The needle length should not exceed one and one-half inches. A one and one-fourth inch needle is commonly used.

(f) If the patient is receiving a number of intramuscular injections over a prolonged period, the site of injection should be rotated. A record in sites must be kept on the patient's chart for this purpose.

Thigh or quads as quoted:

(a) The volume of medication given in this site can be up to two milliliters injection in an adult.

(b) The needle length must not be less than one inch and should not exceed one and one-half inches for adults. A one and one-fourth inch needle is commonly used.

(c) To administer an injection, make sure the patient's lateral thigh is completely exposed so you can visualize the injection site. The patient should be lying on his back (supine) or seated.

(d) Do not inject into the areas close to the knee or hip bone.

(e) There are no main blood vessels or nerve trunks in the lateral thigh injection site. There is a cutaneous nerve (lateral femoral) superficially located and sometimes damage to these nerves is reported.

Deltoid as quoted:

The safe area for injection is generally defined as about three fingers below the shoulder joint.

(b) The needle length of one inch is normally used because of the size of the deltoid muscle.

(c) The volume of medication given in this site can be up to a maximum of one milliliter per injection for an adult. A volume of 0.5 milliliter or less is more commonly used.

(d) The shoulder should be completely exposed so you can determine the exact location of the injection. The clothing should not be rolled up to attempt to administer an injection.

(e) Ensure that the patient is in a standing or sitting position, with the arm at side and muscles relaxed. Direct the patient to hang the arm loose.

Funny thing is this is taken from a school textbook so you saying in school you were taught that the body can take more; you need to get that teacher fired. I used that textbook when i went to school.

Quads 3ml
Glutes 3ml
Delts 3ml
Pecs 2.5ml
Rear delts 2.5ml
Front delts 1.5ml