What রাহু remedies are for
Rahu remedies are for obsession, addiction and the appetite that cannot be satisfied. Rahu has no day and no temple of its own in classical reckoning, so its remedies are behavioural before they are ritual.
When it is under strain
An afflicted Rahu shows as anxiety, addiction, scandal and chasing what recedes as you approach it. Durga and Bhairava worship, and eclipse-day practice, are the classical response.