Convert mg/L to mcg/ml

I normally take one two mg tablet daily. However, new prescription is given in 500 micrograms, how many will I need to take to get equivalent dose

[JohnS]

Your prescription should include dosage instructions. Perhaps your doctor is changing your dosage.

However, 500 mcg = 0.5 mg. A microgram is 1/1000 of a milligram.

Question: ordered Dopamine 3mcg/kg/min. Your patient weights 220 pounds.
Available is Dopamine 400mg in 200ml. What is the rate you will set the pump at in ml/hr?

if i have a bottle of liquid clen , that contains 50ml , and need to take 20mcg's , twice daily , how many ml's is that?

[JohnS]

Originally Posted by Unregistered

Question: ordered Dopamine 3mcg/kg/min. Your patient weights 220 pounds.
Available is Dopamine 400mg in 200ml. What is the rate you will set the pump at in ml/hr?

What a dog's breakfast of units. I sincerely hope this is a homework question and NOT the way real hospitals dose real people. It is silly to weigh people in pounds if dosing will be per kilogram; similarly minutes and hours.

However, 220 lb is about 100 kg, so 300 µg/minute are required. Since there are 60 min/hr, this is 18000 µg/hr, or 18 mg/hr.

18 mg/hr x 200 mL/400 mg = 9 mL/hr

Originally Posted by Unregistered

need to convert mg/L to mcg/ml

0.125mg to mcg

[JohnS]

Originally Posted by Unregistered

0.125mg to mcg

1 mg = 1000 mcg, so
0.125 mg = 125 mcg

100mcg is equal to how many milligrams

[JohnS]

Originally Posted by Unregistered

100mcg is equal to how many milligrams

If 1000 mcg = 1 mg,
then 100 mcg = 0.1 mg

Originally Posted by Unregistered

need to convert mg/L to mcg/ml

0.5 mg= mcg