Intramuscular Administration of Methylprednisolone

Proper Administration Technique

• The American College of Physicians recommends using a 22-25 gauge, 1-1½ inch needle for intramuscular injections in adults to ensure proper delivery 1
• The proper administration technique includes inserting the needle at a 90-degree angle to ensure proper muscle penetration, and rotating injection sites to prevent tissue damage and ensure proper absorption 1
• Recommended injection sites include the deltoid, anterolateral thigh, and ventrogluteal area 1

Precautions and Monitoring

• Patients should be monitored for potential adverse effects including hypertension, weight gain, hyperglycemia, and cataracts 1
• The American Academy of Allergy, Asthma, and Immunology recommends considering Pneumocystis prophylaxis with trimethoprim-sulfamethoxazole if using ≥20 mg of corticosteroids for 4 weeks or longer 1
• Bone health should be monitored due to risk of osteoporosis and avascular necrosis with prolonged use 1
• Avoid abrupt discontinuation; gradual tapering is necessary to prevent adrenal insufficiency 1

Important Cautions

• The American Academy of Allergy, Asthma, and Immunology recommends against using intramuscular glucocorticosteroids for allergic rhinitis due to potential side effects that may be more serious than the condition itself 2