Questions: Dr. Johns, a Urologist, orders Septra DS for Mr. King for a urinary tract infection. Dr. Johns wants Mr. King to take Septra DS bid × 7 days and then daily for 21 days. How many tablets should be prepared for dispensing?

Solution Steps

For the first 7 days, Mr. King is to take Septra DS twice a day. The total number of tablets for this period can be calculated as: \[ \text{Tablets for bid dosage} = 7 \, \text{days} \times 2 \, \text{tablets/day} = 14 \, \text{tablets} \]

For the next 21 days, Mr. King is to take Septra DS once a day. The total number of tablets for this period can be calculated as: \[ \text{Tablets for daily dosage} = 21 \, \text{days} \times 1 \, \text{tablet/day} = 21 \, \text{tablets} \]

To find the total number of tablets required for the entire treatment period, we sum the tablets from both dosage schedules: \[ \text{Total tablets} = \text{Tablets for bid dosage} + \text{Tablets for daily dosage} = 14 \, \text{tablets} + 21 \, \text{tablets} = 35 \, \text{tablets} \]

Final Answer