Suggest Medication For Severe Pain In Thigh After A Fall

Dear Doctor, My father aged 84 yrs, had a fall today morning in the house while walking . He is very weak, just walks in the house , for last 10 years. he was operated last june 2010 for surgical intervention ( Bipolar Implant) right side. He was walking with 4 legged fixed walker when he fell down. he has lot of pain near the thing bone on left leg. his left leg goes inwards when he sleeps on the bed. He is very skinny and cannot be operated this time for surgery. we took the risk last year. What medication can you suggest, immediate pain killers which can be given, He is unable to walk now. Regards,

vinayak Korgaonker