Allergy method), and provocative and neutralization (subcutaneous) testing or sublingual provocation. Before a diagnosis of allergic disease can be confirmed, other possible causes of the presenting symptoms should be considered. Vasomotor rhinitis, for example, is one of many illnesses that share symptoms with allergic rhinitis, underscoring the need for professional differential diagnosis. Once a diagnosis of asthma, rhinitis, anaphylaxis, or other allergic disease has been made, there are several methods for discovering the causative agent of that allergy. Dietary avoidance is not effective as a preventative measure for allergies. Early exposure to potential allergens may actually be protective. Fish oil supplementation
Double Allergic space. Powderfinger spent less money producing "Double Allergic" than on their previous works. Previously, the band had worked with Tony Cohen, whom Fanning stated was expensive due to his success in the industry. For "Double Allergic" the band chose Tim Whitten, a less well known producer, and because the band knew what they intended to do as they entered the studio they managed to spend less despite the improved sound. Middleton commented on Whitten's capabilities in the recording studio, saying "He's what a band looks for in a producer/engineer, because he's got his own ideas", but stating that Whitten would