UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of The

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): January 25, 2012

TEKELEC

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (919) 460-5500

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

At a special meeting of the shareholders (the “Special Meeting”) of Tekelec, a California corporation (the “Company”), held on January 25, 2012, the Company’s shareholders approved the proposal to approve the Agreement and Plan of Merger (the “Merger Agreement”), dated as of November 6, 2011, by and among Titan Private Holdings I, LLC, a Delaware limited liability company (the “Parent”), Titan Private Acquisition Corp., a California corporation (the “Merger Subsidiary”), and the Company, which provides for the merger of the Merger Subsidiary with and into the Company (the “Merger”), with the Company surviving the Merger and being a wholly owned subsidiary of Parent. The shareholders of the Company also voted to approve the proposal to adjourn or postpone the Special Meeting to a later date, if necessary or appropriate, to solicit additional proxies if there were insufficient votes at the time of the Special Meeting to approve the proposal to adopt the Merger Agreement. The Special Meeting was not adjourned to a later date because there were sufficient votes at the time of the Special Meeting to approve the Merger Agreement. At the Special Meeting, the shareholders of the Company also approved a proposal to approve, on a non-binding, advisory basis, certain merger-related golden parachute compensation that will be paid or that may become payable to the Company’s named executive officers in connection with the Merger. The matters acted upon at the Special Meeting are described in more detail in the Company’s Definitive Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission (the “SEC”) on December 19, 2011 (as supplemented by the Supplement to Proxy Statement filed with the SEC on January 19, 2012) pursuant to which proxies were solicited. There were 54,528,037 shares of the Company’s common stock present in person or represented by proxy at the Special Meeting, representing 78.62% of the shares entitled to vote at the Special Meeting. The final voting results for each proposal are set forth below:

Proposal 1: To approve the Merger Agreement.

Proposal 2: To approve the adjournment or postponement of the Special Meeting to a later date, if necessary or appropriate, to solicit additional proxies if there are insufficient votes at the time of the Special Meeting to approve the Merger Agreement.

Proposal 3: To approve, on a non-binding, advisory basis, certain golden parachute compensation that will be paid or that may become payable to the Company’s named executive officers in connection with the Merger.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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