“Manufacturing constraints" mean the 10ml option "will cease to be available in the UK through 2017", it said.

However, Allergan said it is “committed” to the continued supply of Pred-Forte and will invest to grow its production capacity of ocular steroids.

While the 5ml option has been subject to "restricted and intermittent" supply, there will now be a "significant increase", it added.

Supplies of FML 5ml and 10ml steroid eye drops will also increase from April 1.

For more information, contact 0808 238 1500.