| Effect | Decrease |
| Trial Design | Double blind |
| Trial Length | n/a |
| Number of Subjects | 640 |
| Sex | n/a |
The pairing of aspirin (500-1000mg) and pseudoephedrine (an ephedra alkaloid) at 30-60mg was effective in reducing the perception of pain in a sample of 640 persons with upper respiratory tract infection.
