Choosing the appropriate antiepileptic medication in the older person with epilepsy is particularly important. Not only do the elderly tend to experience side effects more often than younger people, but they are often taking several additional medications for other conditions, making both side effects and drug interactions more likely. Interactions between antiepileptic drugs and other medications may mean decreased efficacy of either medication, increased toxicity of one or another medication, and in some instances, may even mean increased seizures, as some drugs can cause or contribute to the occurrence of seizures. Memory problems and financial limitations also commonly prevent elderly patients from taking their medications in the prescribed dosages.