<prompt> Treatment of choice of Nodulocystic Acne is :ErythromycinIsoretinoinTetracyclinePUVA  <response>: Ans. is b Isotretinoin Ref Harrison 16e, p 295 Page 3151 Rexburgs 16e Page 1561According to this table 3 choice are correct but Harrison says that severe nodulocystic acne not responsive to oral antibiotics, hormonal therapy or topical therapy may be treated with synthetic retinoid, Isotretinoin. 