You are working as a pharmacist independent prescriber in a…

You are working as a pharmacist independent prescriber in a rheumatology clinic. A patient is prescribed methotrexate 15mg once a week for rheumatoid arthritis and you wish to add in folic acid 5mg tablets to reduce the risk of adverse effects. You decide to prescribe ‘folic acid 5mg tablets, ONE tablet to be taken WEEKLY three days after the methotrexate dose’. How many folic acid 5mg tablets should you prescribe to provide treatment for four weeks?

A patient is admitted to hospital after an overdose of cital…

A patient is admitted to hospital after an overdose of citalopram tablets. A blood plasma concentration is measured at 1000mcg/L. If citalopram has a half-life of 35 hours, how many hours will it take for the plasma concentration to fall to a safe level of 250mcg/L?