Final answer:
To avoid complications such as sciatica, one must be cautious not to administer intramuscular injections near the sciatic nerve in the pelvic limb.
Step-by-step explanation:
When giving intramuscular injections in the pelvic limb, it is important to avoid the sciatic nerve. This systemic nerve comes from the sacral plexus and is a combination of the tibial and fibular nerves. It extends across the hip joint and gluteal region into the upper posterior leg. Administering an injection near the sciatic nerve can cause sciatica, a painful condition resulting from inflammation or compression of the sciatic nerve. To avoid complications such as sciatica, one must be cautious not to administer intramuscular injections near the sciatic nerve in the pelvic limb.