If a pharmacy technician needs to dispense 120ML of codeine/guaifenesin solution 100mg/5mL, which package should be used?

To determine the appropriate package size for dispensing 120 mL of codeine/guaifenesin solution at a concentration of 100 mg/5 mL, it's important to convert the volume from milliliters to ounces since the options for packaging are provided in ounces.

1. Conversion of milliliters to ounces: 120 mL is equivalent to approximately 4.06 ounces (since 1 ounce is roughly 29.57 mL).

2. Choosing the correct package size: The closest larger size package available from the options would be the 4 oz prescription bottle. Using a 4 oz bottle allows for sufficient space to accommodate the volume of the solution, ensuring that there is no overflow or difficulty in dispensing.

Selecting this package size is important not only for proper dispensing but also for ensuring there is adequate room for labeling and any necessary safety information that must accompany the medication. This option aligns with the requirement to provide a suitable container for the quantity being dispensed.

Therefore, opting for the 4 oz prescription bottle is appropriate given the total volume required.