13th November 2020

A 14-year-old boy is seen by his general practitioner with ongoing symptoms of asthma

A 14-year-old boy is seen by his general practitioner with ongoing symptoms of asthma. Despite having been on various inhalers and increasingly potent steroids, his symptoms are still not controlled. A referral to secondary care is made, who decide to start the patient on theophylline. 

When should the plasma-theophylline concentration be measured after starting oral treatment?

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