# Effect on Tear Functions of Pretarsal and Preseptal Techniques of Botulinum Toxin Type A Injection in Hemifacial Spasm

> **NCT01564979** · PHASE2 · UNKNOWN · sponsor: **Khon Kaen University** · enrollment: 26 (estimated)

## Conditions studied

- Hemifacial Spasm

## Interventions

- **DRUG:** preseptal injection of botulinum toxin type A
- **DRUG:** pretarsal injection of Botulinum toxin type A

## Key facts

- **NCT ID:** NCT01564979
- **Lead sponsor:** Khon Kaen University
- **Sponsor class:** OTHER
- **Phase:** PHASE2
- **Study type:** INTERVENTIONAL
- **Status:** UNKNOWN
- **Start date:** 2012-04
- **Primary completion:** 2012-09
- **Final completion:** 2012-12
- **Target enrollment:** 26 (ESTIMATED)
- **Last updated:** 2012-03-28


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT01564979

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT01564979, "Effect on Tear Functions of Pretarsal and Preseptal Techniques of Botulinum Toxin Type A Injection in Hemifacial Spasm". Retrieved via AI Analytics 2026-05-25 from https://api.ai-analytics.org/clinical/NCT01564979. Licensed CC0.

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