The aim of this study is to examine the effects of intramuscular (IM) injections administered in three different lying positions (supine, prone, and lateral) into the ventrogluteal site on patient pain, comfort, and procedural satisfaction. The study will be conducted as a randomized controlled experimental trial with three groups. In Experimental Group 1, patients will be placed in the supine position; in Experimental Group 2, the lateral position; and in Experimental Group 3, the prone position prior to the injection procedure, followed by an IM injection into the ventrogluteal site. Subsequent to the procedure, patients' pain, comfort, and procedural satisfaction levels will be assessed.

Inclusion Criteria:

• Being 18 years of age or older,
• Having received an IM injection at least one week prior to the study,
• Absence of scars, ecchymosis, or hematomas at the injection site,
• Having a BMI between 18.5 and 24.9 kg/m²,
• Absence of lower extremity paralysis,
• Not receiving any oral or parenteral analgesic treatment prior to the injection.

Exclusion Criteria:

• Failure of the patient to respond to the questions in the post-procedure data collection form.