To calculate the amount for one dose of Gentamycin for a premature infant weighing 2000 grams, we need to convert the weight from grams to kilograms.
1 gram is equal to 0.001 kilograms.
So, for a 2000 gram infant:
2000 grams × 0.001 kg/gram = 2 kg
Now, we can calculate the amount for one dose of Gentamycin:
Dose = 25 mg/kg/day × 2 kg
Dose = 50 mg
Therefore, one dose of Gentamycin for the premature infant weighing 2000 grams would be 50 mg. It's important to consult a healthcare professional for precise dosing instructions and to ensure the correct administration of medication.