Rinkel injection therapy: a multicenter controlled study

Area of Science:

• Allergy and Immunology
• Clinical Research
• Otolaryngology

Background:

• Atopic rhinitis is a common allergic condition.
• Rinkel injection therapy (RIT) is a treatment option for allergic diseases.
• The efficacy of RIT compared to placebo requires further investigation.

Purpose of the Study:

• To evaluate the effectiveness of Rinkel injection therapy (RIT) versus a histamine placebo in treating atopic rhinitis.
• To assess the impact of RIT on symptom scores, medication use, and specific IgE antibody levels.

Main Methods:

• A 2-year, double-blind, multicenter study involving 155 subjects with atopic rhinitis.
• Comparison of RIT with a histamine placebo during natural pollen seasons.
• Data collection included symptom, medication, and physical examination scores, and radioallergosorbent test (RAST) for IgE levels.

Main Results:

• No consistent significant differences were observed between RIT and placebo groups in weekly scores or RAST levels throughout most of the study.
• A short-term decrease in symptom and medication scores was noted in the RIT group after the mountain cedar season.
• Overall seasonal comparison revealed no significant difference in efficacy between RIT and placebo.

Conclusions:

• Rinkel injection therapy (RIT) demonstrated no superior efficacy over a histamine placebo for atopic rhinitis.
• RIT did not significantly influence symptom scores, medication use, physical examination findings, or IgE antibody levels.
• The study suggests RIT may not be a more effective treatment than placebo for allergic rhinitis.