Discomfort, Pain, and Bruising: It's common to experience some level of discomfort, pain, or bruising at the site of the injection. This is usually temporary and resolves on its own.
Inflammation: In some cases, the muscle tissue may become inflamed at the injection site. This can cause redness, swelling, and increased warmth in the area. It typically resolves without intervention but may require medical attention if severe.
Allergic Reactions: Rarely, individuals may experience allergic reactions to the medication or components of the injection, such as the needle, syringe, or preservatives in the medication. Symptoms of an allergic reaction may include rash, itching, hives, difficulty breathing, or swelling of the face, lips, tongue, or throat. Anaphylaxis, a severe allergic reaction, is a medical emergency and requires immediate treatment.
Infection: Although rare, there is a risk of infection at the injection site. Signs of infection may include redness, warmth, swelling, pain, or pus at the injection site.
Nerve or Blood Vessel Damage: In rare cases, the needle used for the injection may inadvertently damage nearby nerves or blood vessels, leading to pain, numbness, tingling, or bleeding.
Cardiovascular Events: Extremely rare but serious complications such as cardiac arrest or other cardiovascular events may occur, particularly in individuals with pre-existing heart conditions or other risk factors.
Systemic Side Effects: Some medications administered via IM injection may cause systemic side effects beyond the injection site. These can include nausea, vomiting, dizziness, headache, changes in blood pressure, or allergic reactions affecting other parts of the body.