The present disclosure relates to compositions containing certain pyrimidine compounds such as minoxidil and/or certain pyrimidine sulfate (inner salt) compounds such as minoxidil sulfate and especially compositions containing pyrimidine compounds in combination with an admixtures comprising at least one antioxidant, at least one organic acid and a select fatty acid mixture. The present disclosure also relates to use of the compositions to grow and/or regrow hair and/or prevent hair loss in mammals and particularly in humans.