US pharmaceutical company Allergan has announced a major expansion of its botox facility in Westport, Co Mayo, with the creation of 200 new jobs.

Speaking at the plant this morning, Taoiseach Enda Kenny said the development would provide a major boost for the region, bringing further high-quality jobs to the west of Ireland.

Allergan currently employs over 800 people in Westport where it manufactures and develops a range of medical devices and pharmaceutical products, the best known of which is botox.

The US multinational is now investing €270m ($350m) in a new botox facility at its Westport site.

Allergan Managing Director Pat O'Donnell said that with the help of the IDA, the company had acquired the technology park adjacent to the plant to meet the growing demand for the product.

In addition to cosmetic treatments, the use of botox to treat medical conditions is on the increase.

The Irish Medicines Board has recently approved the use of botox in treating urinary problems and chronic migraine symptoms.

The 200 new jobs at Allergan will come on stream over the next four years.

A further 250 jobs are expected to be created locally when construction work on the new facility begins later in the year.