A powdered medication label instructs to add 5 mL of diluent to achieve a concentration of 50 mg/mL. If the prescribed dose is 125 mg, how many milliliters should be administered?

A. 18 gauge, 1 1/2 inch: An 18-gauge needle is very large and long, typically used for rapid fluid administration or blood transfusions. Using this size for an intradermal injection would cause significant tissue trauma and pain.

B. 21 gauge, 1 inch: A 21-gauge, 1-inch needle is commonly used for intramuscular injections. It is too thick and too long for placement within the dermal layer, increasing the risk of incorrect administration.

C. 26–27 gauge, 1/2 inch: Intradermal injections require a very fine, short needle to deposit medication just beneath the epidermis. A 26–27 gauge needle with a 1/2-inch length allows precise placement and minimizes tissue damage.

D. 23–25 gauge, 5/8 inch: This needle size is more appropriate for subcutaneous injections. It is longer and thicker than needed for intradermal administration and may penetrate too deeply into subcutaneous tissue.

A. Move the decimal point three places to the left: Converting milliliters to liters requires dividing by 1,000 because 1 liter equals 1,000 milliliters. Moving the decimal three places to the left converts 1,500 mL to 1.5 L.

B. Move the decimal point two places to the left: Moving the decimal two places would convert 1,500 mL to 15 L, which is incorrect and significantly overestimates the volume.

C. Move the decimal point three places to the right: Moving the decimal to the right would multiply the value by 1,000, converting 1,500 mL to 1,500,000 L, which is inaccurate.

D. Move the decimal point two places to the right: This would convert 1,500 mL to 150,000 L, which is also incorrect.