The goal of this clinical trial is to evaluate whether two different intramuscular (IM) injection techniques-Manual Pressure and Traction-Pressure-Release (TPR)-can effectively reduce injection-related pain and improve patient satisfaction in adult hospitalized patients receiving diclofenac sodium (3 mL) via IM injection. The main questions the study aims to answer are: Does the TPR technique reduce IM injection pain more effectively than the standard method? Does the Manual Pressure technique reduce IM injection pain more effectively than the standard method? How are patients' fear of injection and experienced pain related? Since there is a comparison group, researchers will compare three arms (Control, Manual Pressure, TPR) to determine whether either technique results in lower pain scores and higher satisfaction compared with the standard IM injection procedure. Participants will: Receive diclofenac sodium via IM injection in the ventrogluteal site using one of three randomized techniques: * Standard IM injection (Control) * Manual Pressure technique * Traction-Pressure-Release (TPR) technique Rate their pain using the Visual Analog Scale (VAS) immediately after the injection. Rate their satisfaction using the Injection Satisfaction Scale. Provide demographic and clinical data through a Patient Information Form. This study uses a single-blind randomized controlled trial design with three parallel groups. A total of 174 adult patients will be enrolled to ensure adequate power for statistical comparison.
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Pain intensity after intramuscular injection
Timeframe: Immediately after injection (within 1-2 minutes)