This trial is active, not recruiting.

Conditions insect bites, stings
Treatments zapperclick, inactivated zapperclick device
Phase phase 3
Sponsor London School of Hygiene and Tropical Medicine
Start date March 2008
End date November 2008
Trial size 120 participants
Trial identifier NCT00825214, LSHTM/HILL/08/01


Mosquito bites commonly result in redness, swelling and itching. This study will determine if a device that emits a small piezo-electrical impulse can provide relief from these symptoms. Volunteers entering the study will have a mosquito bite on one forearm. Redness and irritation will be recorded periodically for 24 hours. Comparing data from subjects randomised to the treatment or a placebo device will be analysed to determine effectiveness of the product. We will also ask the subjects their view on how easy the product is to use and clarity of instructions provided.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Endpoint classification efficacy study
Intervention model parallel assignment
Masking double blind (subject, investigator, outcomes assessor)
Primary purpose treatment
(Active Comparator)
Use of zapperclick on mosquito bite
Device deliveres small piezoelectrical discharge to bite site (forearm)
(Placebo Comparator)
use of inactivated zapperclick on mosquito bite
inactivated zapperclick device

Primary Outcomes

reduction in itching
time frame: 24 hours

Secondary Outcomes

reduction in erythema / oedema
time frame: 24 hours

Eligibility Criteria

Male or female participants from 16 years up to 60 years old.

Inclusion Criteria: - known rection to mosquito bites - willing to attend clinic for 2 hours during measurements - informed written consent Exclusion Criteria: - hypersensitivity to bites or stings - atopic allergy - pacemaker - pregnant / breast feeding - use of other medication including pain killers

Additional Information

Official title Evaluation of a Piezoelectric Device (Zapperclick) for Relief From Mosquito Bites
Trial information was received from ClinicalTrials.gov and was last updated in January 2009.
Information provided to ClinicalTrials.gov by London School of Hygiene and Tropical Medicine.