Mix It Rx Pharmacy Share: Pharmacies Mix It Rx Pharmacy Visit Website 4775 Lexington Blvd. Missouri City, TX 77454 (346) 341-7995 About Map About Mix It Rx is a small pharmacy located in Missouri City, TX offering a variety of services including conventional prescription filling, compounding, pet prescriptions, vaccines and free delivery. What's Nearby? Distance: 5 10 15 20 25 50 mi.