Tadarise 40 mg, which contains tadalafil, is a medication commonly used to treat erectile dysfunction and sometimes benign prostatic hyperplasia. For patients with a history of severe chronic migraines, there are a few considerations to keep in mind:

1. Drug Interactions: Tadalafil can interact with medications used to treat migraines, especially those that affect blood pressure or blood flow, such as nitrates. It's crucial to discuss all your medications with your healthcare provider.
   
2. Side Effects: Tadarise 40mg can cause side effects like headaches, which might exacerbate a pre-existing condition like chronic migraines. It's important to monitor for any worsening of your migraine symptoms.
   
3. Underlying Conditions: If you have other health conditions that could be affected by tadalafil, such as cardiovascular issues, your doctor will need to consider these as well. Chronic migraine patients often have complex health profiles that need careful management.
   
4. Consult Your Healthcare Provider: Given your history of severe chronic migraines, it’s essential to consult with your healthcare provider before starting tadalafil. They can provide personalized advice based on your medical history and current health status.
   

In summary, while tadalafil can be used in many patients with various health conditions, its use in individuals with severe chronic migraines requires careful consideration and consultation with a healthcare provider.