#1 Clinical Trials Search in Europe

Azelastine Hydrochloride

Azelastine Hydrochloride, a potent antihistamine, has been the subject of several clinical trials aimed at evaluating its effectiveness in treating various allergic conditions, particularly allergic rhinitis and conjunctivitis. These studies have explored its use alone and in combination with other medications, comparing its efficacy to placebos and other active treatments. The trials have focused on symptom relief, onset of action, and overall quality of life improvements for patients suffering from seasonal and perennial allergies.

Table of Contents

What is Azelastine Hydrochloride?

Azelastine Hydrochloride is a medication used to treat various allergic conditions. It belongs to a class of drugs called antihistamines, which work by blocking the effects of histamine, a substance in the body that causes allergic symptoms[1]. Azelastine is available in different forms, including nasal sprays and eye drops, depending on the specific condition being treated[2].

What Conditions Does Azelastine Treat?

Azelastine Hydrochloride is primarily used to treat the following conditions:

  • Seasonal Allergic Rhinitis: Also known as hay fever, this is an allergic reaction to pollen from trees, grasses, or weeds[1].
  • Perennial Allergic Rhinitis: This is a year-round allergic reaction to substances like dust mites, pet dander, or mold[3].
  • Allergic Conjunctivitis: An allergic reaction affecting the eyes, causing itching, redness, and tearing[2].

How Does Azelastine Work?

Azelastine works by blocking histamine receptors in the body. Histamine is a chemical released during an allergic reaction that causes symptoms like sneezing, itching, and runny nose. By blocking these receptors, Azelastine helps to reduce these allergic symptoms[1].

How is Azelastine Administered?

Azelastine is typically administered in the following ways:

  • Nasal Spray: For treating allergic rhinitis, Azelastine is often used as a nasal spray. The usual dosage is one or two sprays in each nostril, once or twice daily[4].
  • Eye Drops: For allergic conjunctivitis, Azelastine is administered as eye drops. The typical dosage is one drop in each affected eye, twice daily[2].

Efficacy of Azelastine

Clinical trials have shown Azelastine to be effective in treating allergic conditions. Its efficacy is often measured using symptom scores:

  • Total Nasal Symptom Score (TNSS): This score measures symptoms like sneezing, runny nose, itchy nose, and nasal congestion. Studies have shown significant improvements in TNSS with Azelastine use[1].
  • Ocular Itch Score: For allergic conjunctivitis, Azelastine eye drops have been shown to reduce eye itching significantly[2].

Combination Therapies with Azelastine

Research has also explored combining Azelastine with other medications for enhanced efficacy:

  • Azelastine + Fluticasone: This combination nasal spray has shown superior efficacy compared to either medication alone in treating allergic rhinitis[1].
  • Azelastine + Mometasone: Another combination being studied for allergic rhinitis treatment[5].

Potential Side Effects

While Azelastine is generally well-tolerated, some potential side effects may include:

  • Bitter taste in the mouth (with nasal spray)
  • Nasal irritation
  • Headache
  • Drowsiness (less common with newer formulations)

These side effects are usually mild and tend to decrease with continued use[6].

Ongoing Research

Ongoing research is exploring new formulations and combinations of Azelastine:

  • Studies on the onset of action, aiming to determine how quickly symptom relief occurs after using Azelastine nasal spray[4].
  • Investigations into the efficacy of Azelastine in combination with other medications for enhanced treatment of allergic conditions[5].
  • Comparisons of Azelastine with other antihistamine eye drops for treating allergic conjunctivitis[2].
Aspect Details
Primary Use Treatment of allergic rhinitis and conjunctivitis
Formulations Studied Nasal spray, eye drops
Common Dosage 1-2 sprays per nostril twice daily (nasal spray), 1 drop per eye twice daily (eye drops)
Efficacy Measures Total Nasal Symptom Score (TNSS), ocular itch scores, quality of life questionnaires
Combination Studies Often combined with corticosteroids like fluticasone propionate
Trial Durations Typically 2-4 weeks, some focusing on immediate onset (hours)
Common Side Effects Nasal irritation, bitter taste (nasal spray); eye irritation (eye drops)
Patient Populations Adults and adolescents with seasonal or perennial allergies
Comparison Treatments Placebo, other antihistamines, corticosteroids

FAQ

  • What is Azelastine Hydrochloride used for in clinical trials? Azelastine Hydrochloride is primarily used in clinical trials for treating allergic conditions such as seasonal and perennial allergic rhinitis (hay fever) and allergic conjunctivitis. It's often studied as a nasal spray or eye drops.
  • How is Azelastine Hydrochloride's effectiveness measured in these trials? Its effectiveness is typically measured by changes in symptom scores, such as the Total Nasal Symptom Score (TNSS) for rhinitis, which includes factors like runny nose, nasal congestion, and sneezing. For conjunctivitis, ocular itch scores are often used.
  • Is Azelastine Hydrochloride studied alone or in combination with other drugs? Both. Some trials study Azelastine Hydrochloride on its own, while others examine its effectiveness when combined with other medications, particularly corticosteroids like fluticasone propionate for nasal allergies.
  • How long do typical clinical trials for Azelastine Hydrochloride last? The duration of trials varies, but many last between 2 to 4 weeks. Some studies focus on the immediate onset of action, measuring effects within hours, while others assess long-term efficacy and safety over several weeks.
  • What are some common side effects of Azelastine Hydrochloride observed in clinical trials? Common side effects reported in trials include nasal irritation, bitter taste, and headache for nasal sprays. For eye drops, eye irritation and a brief stinging sensation upon application are sometimes noted. However, most trials report that Azelastine Hydrochloride is generally well-tolerated.

Ongoing Clinical Trials on Azelastine Hydrochloride

  • Study on Baclofen for Reducing Benzodiazepine Use in Patients with Benzodiazepine Dependence

    Recruiting

    1 1 1
    Investigated drugs:
    France

  • Study on the Effects of Mannan-Conjugated Birch Pollen Allergoids for Adolescents and Adults with Birch Pollen-Induced Allergic Rhinitis or Rhinoconjunctivitis

    Not recruiting

    1 1 1
    Investigated drugs:
    Germany

Glossary

  • Allergic Rhinitis: An inflammation of the nasal passages caused by an allergic reaction, resulting in symptoms such as sneezing, runny nose, and nasal congestion.
  • Perennial Allergic Rhinitis: Allergic rhinitis that occurs year-round, typically caused by indoor allergens like dust mites, pet dander, or mold.
  • Seasonal Allergic Rhinitis: Allergic rhinitis that occurs at specific times of the year, usually in response to outdoor allergens like pollen.
  • Total Nasal Symptom Score (TNSS): A measure used in clinical trials to assess the severity of nasal allergy symptoms, typically including runny nose, nasal congestion, sneezing, and nasal itching.
  • Placebo: An inactive substance or treatment used in clinical trials as a control to compare against the effects of the active drug being studied.
  • Double-blind: A study design where neither the participants nor the researchers know who is receiving the active treatment and who is receiving the placebo.
  • Rhinoconjunctivitis Quality of Life Questionnaire (RQLQ): A standardized questionnaire used to assess how allergic rhinitis and conjunctivitis affect a patient's quality of life.
  • Antihistamine: A type of medication that blocks the effects of histamine, a substance produced by the body during an allergic reaction.
  • Corticosteroid: A class of steroid hormones used to reduce inflammation, often used in combination with antihistamines in allergy treatments.
  • Nasal Congestion: A stuffy or blocked feeling in the nose due to swollen nasal tissues, often a symptom of allergies.

References

  1. https://clinicaltrials.gov/study/NCT00740792
  2. https://clinicaltrials.gov/study/NCT06212973
  3. https://clinicaltrials.gov/study/NCT01470053
  4. https://clinicaltrials.gov/study/NCT04264637
  5. https://clinicaltrials.gov/study/NCT05887843
  6. https://clinicaltrials.gov/study/NCT00712920