5 The practitioner prescribes levothyroxine Synthroid 17 mcg

5. The practitioner prescribes levothyroxine (Synthroid) 1.7 mcg/kg body weight/day. R.M. weighs 130 lb. What should be her daily dose of Synthroid in milligrams? How would her prescription read?

Solution

RM Weighs = 130 lbs

Conversion Factor

1 lbs = 0.453592 Kg

Mass in Kg = 130 * 0.453592 = 58.967 Kg

Daily dose = 1.7 mcg/Kg

Dosage Required = 1.7 mcg/Kg * 58.967 Kg

=> 100.2439 mcg

1 mcg = 0.001 mg

Hence the dosage required in mg is equal to 0.10024 mg

Hence the practicioner must give 0.10024 mg of dosage to the RM weight