Important Administration Instructions

• Always check the insulin label before administration to confirm the correct insulin product is being used [see Warnings and Precautions (5.4)].
• Inspect HUMULIN R visually before use. It should appear clear and colorless. Do not use HUMULIN R if particulate matter or coloration is seen.

Route of Administration

Subcutaneous Injection

• Inject HUMULIN R subcutaneously approximately 30 minutes before meals into the thigh, upper arm, abdomen, or buttocks.
• ​Rotate injection sites within the same region from one injection to the next to reduce the risk of lipodystrophy and localized cutaneous amyloidosis. Do not inject into areas of lipodystrophy or localized cutaneous amyloidosis [see Warnings and Precautions (5.2) and Adverse Reactions (6)].
• ​During changes to a patient's insulin regimen, increase the frequency of blood glucose monitoring [see Warnings and Precautions (5.2)].

Intravenous Administration

• Administer HUMULIN R intravenously ONLY under medical supervision with close monitoring of blood glucose and potassium levels to reduce the risk of hypoglycemia and hypokalemia [see Warnings and Precautions (5.3, 5.6), How Supplied/Storage and Handling (16.3)].
• For intravenous use, HUMULIN R should be used at concentrations from 0.1 unit/mL to 1 unit/mL in infusion systems containing 0.9% sodium chloride.

Dosing Instructions

• Individualize and adjust the dosage of HUMULIN R based on the route of administration, the patient's metabolic needs, blood glucose monitoring results, and glycemic control goal.
• HUMULIN R given by subcutaneous injection should generally be used in regimens with an intermediate- or long-acting insulin.
• Dosage adjustments may be needed with changes in physical activity, changes in meal patterns (e.g., macronutrient content or timing of food intake), changes in renal or hepatic function, or during acute illness [see Warnings and Precautions (5.2, 5.3), Use in Specific Populations (8.6, 8.7)].
• Dosage adjustment may be needed when switching from another insulin to HUMULIN R [see Warnings and Precautions (5.2)].

Dosage Adjustment due to Drug Interactions

• Dosage adjustment may be needed when HUMULIN R is co-administered with certain drugs [see Drug Interactions (7)].

Instructions for Mixing with Other Insulins for Subcutaneous Injection

• Do not mix HUMULIN R with insulin preparations other than HUMULIN N.
• To mix HUMULIN R and HUMULIN N, draw HUMULIN R into the syringe first. Inject immediately after mixing.