This study is intended to explore and compare the compatibility of additives which were added into the commercial Drag Reduction Agents (DRA) and the solvents in different concentrations using a controlled stress rheometer. Torque induced by the fluid has been measured with the increase of angular velocity. The performance of DRA is directly linked to the drag reduction percentage (%DR) by utilizing the torque measured from the rheometer. Experimental results showed that the presence of additives such as Xanthan gum and filtration control agent in water soluble DRA does not help in the performance of DRA. However, Pour Point Depressants showed great compatibility with the oil soluble DRA.