Alcohol Withdrawal Seizure: This is a common cause of new onset seizures in adults, especially if the patient has a history of alcohol abuse. The seizures typically occur 6-48 hours after the last drink.

Stroke or Transient Ischemic Attack (TIA): Cerebrovascular diseases are a common cause of seizures in adults, especially those with risk factors such as hypertension, diabetes, or hyperlipidemia.
Traumatic Brain Injury: Head trauma can cause seizures, and the risk increases with the severity of the injury.
Infections (e.g., Meningitis, Encephalitis): Central nervous system infections can cause seizures, especially if the patient is immunocompromised.
Brain Tumors: Both primary and metastatic brain tumors can cause seizures, and the risk increases with age.

Subarachnoid Hemorrhage: A life-threatening condition that requires immediate attention. Seizures can be a presenting symptom, especially if the hemorrhage is caused by an aneurysm.
Meningitis: Bacterial meningitis is a medical emergency that requires prompt treatment. Seizures can occur, especially in the early stages of the disease.
Status Epilepticus: A life-threatening condition characterized by prolonged or recurrent seizures without full recovery between them.
Hypoglycemia: Low blood sugar can cause seizures, and it is essential to check the patient's glucose level, especially if they have a history of diabetes.

Autoimmune Encephalitis: A rare condition characterized by inflammation of the brain caused by an autoimmune response. Seizures are a common presenting symptom.
Vasculitis: Inflammation of the blood vessels can cause seizures, especially if the condition affects the central nervous system.
Mitochondrial Disorders: Rare genetic disorders that affect the mitochondria, such as MELAS syndrome, can cause seizures.
Creutzfeldt-Jakob Disease: A rare, degenerative brain disorder that can cause seizures, especially in the later stages of the disease.