Phosphodiesterase-5 Inhibitors and Migraine

A 45-year-old man has a 10-year humanities of migraine without aura occurring about once a week relieved by an oral triptan.
When he sought artistic style for erectile dysfunction from a urologist, the side import of triggering migraine was brought up.
Now the affected role and the urologist want my feeling about whether the semantic role should try an oral phosphodiesterase-5 inhibitor (PDE-5) and, if so, do I have a vantage?Questions What is the risk of PDE-5 triggering migraines?
Does the risk vary among the tierce medications, sildenafil (Viagra), vardenafil (Levitra), and cialis (Cialis)?
Is the risk dose-related?
What is the response time from taking the PDE-5 drug until military operation of the vexation?
Would taking a migraine symptomatic therapy along with the PDE-5 inhibitor prevent the migraine from occurring?
Does the long-duration participant role, tadalafil, justification long-duration migraines?
Do PDE-5-triggered migraines respond to the patient’s usual acute migraine medications?
Are device medications useful in reduction the risk of PDE-5-triggered migraines?
How might PDE-5 inhibitors movement migraine?
This is a part of article Phosphodiesterase-5 Inhibitors and Migraine Taken from "Levitra Compare Viagra" Information Blog