A 13-year-old patient is prescribed IV clarithromycin 500mg BD. He weighs 44kg, is 135cm tall and has a recent serum creatinine of 128 micromol/L.   The equation to calculate eGFR in paediatric patients is provided below: eGFR (mL/minute/1.73m2) = height (cm) x 40 / serum creatinine (micromol/L) The usual dose of clarithromycin is reduced by 50% if the eGFR is between 10-50 mL/minute/1.73m2 and by 75% if the eGFR is less than 10 mL/minute/1.73m2.   How many milligrams of clarithromycin should be prescribed for this patient per dose?

A 21-year-old female patient is currently prescribed citalopram 20mg tablets at a dose of 20mg once daily in the morning. She is not tolerating citalopram and a decision is made to switch her on to mirtazapine. The cross-tapering regimen is provided below:   Drug Current dose Week 1 and 2 Week 3 and 4 Week 5 and 6 Citalopram 20mg OM 10mg OM 5mg OM   Mirtazapine     15mg ON 15mg ON You prescribe the patient citalopram 10mg tablets and inform them to halve the tablets when a 5mg dose is required.   How many citalopram 10mg tablets should be prescribed to complete the cross-tapering regimen?

A 36-year-old patient is currently prescribed lithium citrate (Priadel) 520mg/5ml liquid at a dose of 15mL AT NIGHT. To improve compliance, the decision is made to switch him to lithium carbonate (Priadel) 200mg MR tablets.   How many Priadel 200mg MR tablets should the patient be prescribed for each dose?   Extract from Online BNF for lithium

A patient is supplied with 100mL of a 25%w/v mouthwash which they will dilute 1 in 5 with water prior to use, as described on the label: Pour 2mL of mouthwash into the cap provided and then add water to the 10mL line. Rinse your mouth for one-minute up to twice a day.   What is the %w/v strength of the mouthwash after the patient has diluted the original solution with water?  

Test the claim that the samples come from populations with the same mean. Assume that the populations are normally distributed with the same variance.A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types. The magazine takes a random sample of pens of each type in the following table. Do the data indicate that there is a difference in mean lifetime for the three brands of ballpoint pens? Use

List the original data from the stem-and-leaf plot. 1.

Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.08; confidence level: 98%; and unknown 1.

Solve the problem.How many ways can an IRS auditor select 3 of 10 tax returns for an audit? 1.

Solve the problem.In a certain lottery, five different numbers between 1 and 40 inclusive are drawn. These are the winning numbers. To win the lottery, a person must select the correct 5 numbers in the same order in which they were drawn. What is the probability of winning?

Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.n = 56, x = 30; 95% confidence