Final answer:
To administer a dose of Phenobarbital gr i, one would need to provide 2 tablets of the medication, since Phenobarbital is available in 30 mg tablets and gr i is equivalent to 64.8 mg.
Step-by-step explanation:
The question pertains to the calculation of a medication dose in terms of tablet count, which is a common task in the medical field. Since Phenobarbital is available in 30 mg tablets and a dose of gr i is ordered, we must first convert grain (gr) to milligrams (mg). One grain is approximately equal to 64.8 milligrams. The order of gr i equates to 64.8 mg of Phenobarbital.
Now, to calculate the number of tablets required for a 64.8 mg dose when the available tablet strength is 30 mg, we would use the following steps:
- Divide the ordered dose (64.8 mg) by the tablet strength (30 mg).
- 64.8 mg ÷ 30 mg/tablet = 2.16 tablets.
- Since we can't administer a fraction of a tablet, we would round to the nearest whole tablet.
In this scenario, the patient should be administered 2 tablets to ensure that the dose is as accurate as possible without exceeding the ordered dose. It's critical to note that handling medication dosage should be done with precision and knowledge of pharmacokinetics and tolerability, as incorrect doses can lead to symptoms such as drowsiness, incoordination, or even severe outcomes like coma or death.