Effect of ebastine on mosquito bites

Area of Science:

• Dermatology
• Allergology
• Pharmacology

Background:

• Mosquito bites commonly cause skin reactions including wealing and delayed papules.
• Cetirizine is known to alleviate these symptoms, but the efficacy of other antihistamines remains uninvestigated.
• Understanding the impact of different antihistamines on mosquito bite reactions is crucial for effective symptom management.

Purpose of the Study:

• To evaluate the efficacy of ebastine in mitigating immediate symptoms associated with mosquito bites.
• To compare the effects of different dosages of ebastine (10 mg and 20 mg) against placebo.
• To assess the impact of ebastine on bite lesion size and pruritus.

Main Methods:

• A randomized, cross-over study involving 30 mosquito bite-sensitive adults.
• Participants received ebastine (10 mg or 20 mg) or placebo for 4 days.
• Aedes aegypti mosquito bites were administered to forearms, with lesion size and pruritus (visual analogue scale) measured at multiple time points.

Main Results:

• Ebastine significantly reduced bite lesion size (p = 0.0017) and pruritus (p<0.0001) at 15 minutes post-bite.
• The efficacy of 10 mg and 20 mg ebastine was comparable.
• While effects diminished at later time points, overall analysis showed significant reduction in lesion size and pruritus.
• Sedation was reported in 21% of subjects on ebastine versus 7% on placebo.

Conclusions:

• Prophylactic administration of ebastine demonstrates significant effectiveness against immediate mosquito bite symptoms.
• Ebastine offers a potential therapeutic option for individuals experiencing immediate reactions to mosquito bites.
• Further research may explore long-term efficacy and side effect profiles in broader populations.