Pharmaceutical giant Allergan is to create 200 new jobs in a €350 million investment at its plant in Westport, Co Mayo.

The US multinational, which employs 900 people in Ireland, is expanding to meet growing demand for its Botox product in treatment of migraines and incontinence.

It will take on 200 new staff over the next four years.

It is estimated another 250 jobs will be created indirectly locally during the construction period.

Taoiseach Enda Kenny described the jobs boost as a significant vote of confidence in Ireland. “Developments like this will help us on the path to economic recovery,” he said.

“Allergan’s Westport facility is an important strategic site in their network and contributes more than 50 per cent of global revenues from a range of products manufactured here,” added Mr Kenny, who is a TD for Mayo.

“The expansion of this facility is a much needed boost for the region and will bring further high quality jobs to the west of Ireland.”

Allergan have purchased the technology park next to its Westport facility to allow for the expansion.

Allergan Pharmaceuticals Ireland managing director Pat O’Donnell said the company expected the demand for Botox to continue to grow.