Complex sentence: Nevertheless, it seems likely that adherence can be improved by taking care to explain the benefits and adverse effects of a drug; in a busy clinic it is all too easy for the prescriber to issue a prescription with little or no explanation.
Split into simpler sentences: Nevertheless, it seems likely that adherence can be improved by taking care to explain the benefits and adverse effects of a drug. In a busy clinic it is too easy for the prescriber to give out a prescription with little or no explanation.