The healthcare provider prescribes streptomycin 200 mg intramuscularly every 12 hours. The vial is labeled, "Streptomycin 1 gram/2.5 mL". How many milliliters should the nurse administer? (Enter numerical value only. (If rounding is required, round to the nearest tenth.)

To calculate the correct dosage of streptomycin, the nurse needs to use the following formula: D (desired dose) / H (have dose) x V (volume) = A (amount to administer) In this case, the desired dose is 200 mg, the dose is 1000 mg (1 gram), and the volume is 2.5 mL. Plugging these values into the formula, we get: 200 / 1000 x 2.5 = 0.5 Therefore, the nurse should administer 0.5 mL of streptomycin every 12 hours.