Which statement best defines strength in pharmacology?

Which statement best defines strength in pharmacology?

• A. The force of the drug and its dose
• B. The label color of the medication
• C. The brand name
• D. The shelf life

Answer: (B)

Strength is the amount of active ingredient in each dose or unit of a medication. It tells you how concentrated the drug is and is what you use to determine how much to administer. For a tablet, strength might be 500 mg per tablet; for a liquid, it could be 10 mg per milliliter. This ensures the patient gets the intended amount of medicine and dosing is accurate. The color of the label, the brand name, or the shelf life do not indicate strength; those are about appearance/branding and stability, not the amount of active drug. In practice, you use strength to calculate dose—if a solution is 2 mg/mL and you need 6 mg, you’d give 3 mL. Strength relates to concentration; potency is a related concept describing the amount needed to achieve an effect at a given dose. Always verify the strength on the label before giving medication.

Strength is the amount of active ingredient in each dose or unit of a medication. It tells you how concentrated the drug is and is what you use to determine how much to administer. For a tablet, strength might be 500 mg per tablet; for a liquid, it could be 10 mg per milliliter. This ensures the patient gets the intended amount of medicine and dosing is accurate. The color of the label, the brand name, or the shelf life do not indicate strength; those are about appearance/branding and stability, not the amount of active drug. In practice, you use strength to calculate dose—if a solution is 2 mg/mL and you need 6 mg, you’d give 3 mL. Strength relates to concentration; potency is a related concept describing the amount needed to achieve an effect at a given dose. Always verify the strength on the label before giving medication.