Exhibit 99.1
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a Statement on Schedule 13D (including amendments thereto) with respect to the ordinary shares, $0.01 nominal value per share, of Avadel Pharmaceuticals plc. This Joint Filing Agreement shall be filed as an Exhibit to such Statement.
| Dated: December 11, 2018 | BROADFIN CAPITAL, LLC | |
| By: | /s/ Kevin Kotler | |
| Name: | Kevin Kotler | |
| Title: | Managing Member | |
| BROADFIN HEALTHCARE MASTER FUND, LTD. | ||
| By: | /s/ Kevin Kotler | |
| Name: | Kevin Kotler | |
| Title: | Director | |
| /s/ Kevin Kotler | |
Kevin Kotler
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