Answer
A lump or hardened area is a common injection-site reaction. Seek assessment if it is severe, worsening or accompanied by pus or marked swelling.
Sources for this answer
- Apretude 600 mg prolonged-release suspension for injection — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.