Final answer:
Anticonvulsants such as diazepam can be used for emergency management of generalized tonic-clonic seizures, but are not ideal for ongoing monotherapy due to risks of tolerance and withdrawal.
Step-by-step explanation:
The question centers on the effectiveness of monotherapy with anticonvulsants for generalized tonic-clonic seizures (GTCS). Anticonvulsants are medications that help in managing and preventing seizures. Diazepam, a type of anticonvulsant, is sometimes used during a seizure episode to reduce the risk of additional brain damage. However, due to its potential to lead to a tolerance state, where patients may require increasing quantities to achieve the desired effect, and the risk of withdrawal symptoms upon its discontinuation, its use is generally limited to short-term and emergency interventions, rather than as an ongoing, self-administered treatment for chronic seizure conditions.