Two West Plains women have been arrested on drug charges after authorities in Howell County served search warrants at two different homes. 27 year old Lisa Marie Silva Oropeza was arrested on charges of delivery of a controlled substance and unlawful use of a weapon. She was released on $15,000 bail. 41 year old Barbra Lynette Newton was arrested for delivery of a controlled substance, She was released on $10,000 bail.