Vaishnavas generally advise anybody who is in distress, to remember Lord Sree Narasimha deva.
For remembrance, utterance of Sree Narasimha Mantra is essential.
Lord Sree Narasimha deva removes all anti-devotional desires so that the sincere aspirants can remove the root cause of suffering, which is— ‘aversion to Supreme Lord Sree Krishna’. Simultaneously, it may also give non-eternal benefits. Utterance of the Holy Name should be from the core of the heart, with firm belief.
True Vaishnavas do not want to disturb their object of worship, the Supreme Lord and His Absolute Counterpart Gurudeva, for their worldly difficulties. If they require any kind of relief from physical disease, they take the help of doctors.
— His Divine Grace Srila Bhakti Ballabh Tirtha Goswami Maharaj