A patient is prescribed 100mg/day of antibiotic for two weeks. The antibiotic is available in vials that contain 20mg/vial of the drug. How many vials are necessary for the entire treatment?

The vials are necessary for the entire treatment is 70 vials
We have to first calculate the total number of antibiotics taken by the patient in two weeks, then find the total vials neccessary for the entire treatment.
The total antibiotics for a period of two weeks = (100 mg/day)(2 weeks)
Total = 100 mg/day×14 days
Total = 1400 mg for two weeks.
If the antibiotics contain vials in 20 mg/vials of the drugs,
Then the vials necessary for the entire treatment is
vial for the entire treatment = 1400/20
total vials = 70 vials
Hence the vials are necessary for the entire treatment is 70 vials
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