Advantages for Im injection?

Rapid and uniform absorption of the drug, especially the aqueous solutions

Rapid onset of the action compared to that of the oral and the subcutaneous routes

IM injection bypasses the first-pass metabolism of the drug

It also avoids the gastric factors governing drug absorption

Has efficacy and potency comparable to that of the intravenous drug delivery system

Highly effective for emergency scenarios such as acute psychosis and status epilepticus

Depot injections allow slow, sustained, and prolonged drug action

A large volume of the drug can be administered compared to the subcutaneous route