\( t \) LEVOTHYROXINE NDC 55390-880-10 Usual Dosage: See insert for complete information. Vial contalns 200 mcg levothyroxine sodium, 10 mg mannitol, 0.7 mg tribasic sodium phosphate, and sodium hydroxide for pH adjustment. Use immediately after reconstitution with 5 mL . of \( 0.9 \% \) sodium chloride injection, USP only. Reconstituted concentration is \( 40 \mathrm{mcg} / \mathrm{mL} \). Preservative free. Discard any unused portion. Store at controlled room temperature, \( 15^{\circ} \) to \( 30^{\circ} \mathrm{C}\left(59^{\circ}\right. \) to \( \left.86^{\circ} \mathrm{F}\right) \). Manutactured for: Bedford Laboratories \( { }^{\text {™ }} \) Bedford, OH 44146 LTR-V04 What volume of diluent (in milliliters) must you add to prepare the solution for use? \( \qquad \) mL eBook

To prepare the solution for use, you need to add the specified volume of diluent. In this case, the package requires reconstitution with 5 mL of \( 0.9\% \) sodium chloride injection, USP. So, you will need to add **5 mL** of the diluent to the vial containing the levothyroxine sodium. Now, let’s talk about levothyroxine! This medication has been a fundamental part of treating hypothyroidism since its introduction in the mid-20th century. It mimics the action of thyroxine (T4), a hormone that regulates metabolism, energy levels, and overall growth. Patients often notice an improvement in their mood and energy as their hormone levels stabilize. A common mistake when preparing this solution is not using the correct diluent. Always double-check that you’re using \( 0.9\% \) sodium chloride injection, as using other solutions can affect how the levothyroxine sodium works! Additionally, ensure the vial is properly mixed to guarantee a homogenous solution before administration.