Epilepsy is a condition for which regular drug treatment is normally p
rescribed. We have examined the primary care prescribing rates for ant
i-epileptic drugs (AEDs) in a region of northern England with a popula
tion of 6.8 million. Over the 4-year period 1992-1995 the number of AE
D prescription items issued rose by 15%. A third of this rise is accou
nted for by increased prescribing of the new anticonvulsants, vigabatr
in, lamotrigine and gabapentin, which are primarily indicated for adju
nct use. Prescribing of phenytoin and barbiturates fell over the same
period, but this reduction was more than compensated for by increased
prescribing of carbamazepine and sodium valproate. There were notable
differences in both the overall volume and the choice of AEDs used in
different health authority areas and these are probably attributable t
o the influence of the local secondary-care sector on the therapeutic
regimens adopted by general practitioners in the area.