Elderly individuals who take multiple medicines are particularly at risk of impaired nutritional status.
The official, Richard Abate of the Food and Drug Administration, said the array of products combining multiple medicines led some parents to overdose their children accidentally.
The important factor, Dr. Prezant said, was the use of multiple medicines in varying doses depending on the severity of the smoker's addiction.
An important part of the work has involved medicines reconciliation: a high proportion of A&E patients are already taking multiple medicines, or high-risk medication such as warfarin, and the pharmacist made sure that a new prescription didn't conflict with existing medication.
What does it mean to be an adult and have been on multiple medicines throughout your life?" she says.
They will be needed for needle exchange programmes for drug users as well as in some treatments in which multiple medicines are mixed in the syringe before being injected.
