Complex sentence: It is used mainly to treat complex partial, simple partial, generalized tonic-clonic seizures, myoclonic, and akinetic seizures and since the 1980s it has been a valuable alternative to propranolol in the treatment of essential tremor.
Split into simpler sentences: It is used mainly to treat complex partial, simple partial, generalized tonic-clonic seizures, myoclonic, and akinetic seizures. Since the 1980s it has been a valuable alternative to propranolol in the treatment of essential tremor.