Exhibit 99.1

International Headquarters

2150 St. Elzéar Blvd. West

Laval, Quebec H7L 4A8

Phone: 514.744.6792

Fax: 514.744.6272

Investor Relations:

Laurie W. Little

949-461-6002

laurie.little@valeant.com

Elif McDonald

905-695-7607

elif.mcdonald@valeant.com

Media:

Renee E. Soto/Meghan Gavigan

Sard Verbinnen & Co.

212-687-8080

rsoto@sardverb.com / mgavigan@sardverb.com

VALEANT PHARMACEUTICALS REPORTS THIRD QUARTER 2015 FINANCIAL RESULTS

2015 Third Quarter Results

Fourth Quarter 2015 Guidance

Full Year 2015 Guidance

Laval, Quebec, October 19, 2015 — Valeant Pharmaceuticals International, Inc. (NYSE: VRX) (TSX: VRX) today announced third quarter financial results for 2015.

“Today, we reported yet another consecutive quarter of strong financial results that exceeded expectations,” stated J. Michael Pearson, chairman and chief executive officer. “I am incredibly proud of the hard work and effort put forth by Valeant’s employees around the world. I would also like to thank all the doctors who prescribe our products and the patients who use them. We will be discussing our outperformance on our conference call later today, as well as addressing the most frequently asked questions we have been hearing from our shareholders. With our strong product portfolio and growth prospects, we feel very confident in our future outlook and we are reaffirming our $7.5 billion EBITDA floor for 2016.”

Conference Call and Webcast Information

Valeant will host a conference call and a live webcast along with a slide presentation today at 8:00 a.m. ET (5:00 a.m. PT) to discuss results for the 2015 third quarter. The dial-in number to participate on this call is (877) 876-8393, confirmation code 49576177. International callers should dial

(973) 200-3961, confirmation code 49576177. A replay will be available approximately two hours following the conclusion of the conference call to October 26, 2015, and can be accessed by dialing (855) 859-2056 or (404) 537-3406, confirmation code 49576177.

The webcast and slide presentation will be hosted in the investor relations section of its corporate website at www.valeant.com. Participants should allow approximately five to ten minutes prior to the call’s start time to visit the site and to download any streaming media software needed to listen to the webcast. An online archive of the webcast will be available following the end of the live call in the webcast archive portion of the investor relations section at www.valeant.com.

About Valeant

Valeant Pharmaceuticals International, Inc. (NYSE/TSX:VRX) is a multinational specialty pharmaceutical company that develops, manufactures and markets a broad range of pharmaceutical products primarily in the areas of dermatology, gastrointestinal disorder, eye health, neurology and branded generics. More information about Valeant can be found at www.valeant.com.

Forward-looking Statements

This press release may contain forward-looking statements, including, but not limited to, statements regarding our expected future performance, including guidance with respect to revenue, Cash EPS, adjusted cash flow from operations, and organic growth, and assumptions related to the impact of future generic competition. Forward-looking statements may generally be identified by the use of the words “anticipates,” “expects,” “intends,” “plans,” “should,” “could,” “would,” “may,” “will,” “believes,” “estimates,” “potential,” “target,” or “continue” and variations or similar expressions. These statements are based upon the current expectations and beliefs of management and are subject to certain risks and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. These risks and uncertainties include, but are not limited to, risks and uncertainties discussed in the Company’s most recent annual or quarterly report and detailed from time to time in Valeant’s other filings with the Securities and Exchange Commission and the Canadian Securities Administrators, which factors are incorporated herein by reference. Readers are cautioned not to place undue reliance on any of these forward-looking statements. These forward-looking statements speak only as of the date hereof. Valeant undertakes no obligation to update any of these forward-looking statements to reflect events or circumstances after the date of this press release or to reflect actual outcomes.

Non-GAAP Information

To supplement the financial measures prepared in accordance with U.S. generally accepted accounting principles (GAAP), the company uses non-GAAP financial measures that exclude certain items, such as amortization of inventory step-up, amortization of alliance product assets & property, plant and equipment step up, stock-based compensation step-up, contingent consideration fair value adjustments, restructuring, integration, acquisition-related and other costs, In-process research and development, impairments and other charges, (“IPR&D”), legal settlements outside the ordinary course of business, the impact of currency fluctuations, amortization including intangible asset impairments and other non-cash charges, amortization and write-down of deferred financing costs, debt discounts and ASC 470-20 (FSP APB 14-1) interest, loss on extinguishment of debt, (gain) loss on assets sold/held for sale/impairment, net, (gain) loss on investments, net, and adjusts tax expense to cash taxes. Management

uses non-GAAP financial measures internally for strategic decision making, forecasting future results and evaluating current performance. By disclosing non-GAAP financial measures, management intends to provide investors with a meaningful, consistent comparison of the company’s core operating results and trends for the periods presented. Non-GAAP financial measures are not prepared in accordance with GAAP. Therefore, the information is not necessarily comparable to other companies and should be considered as a supplement to, not a substitute for, or superior to, the corresponding measures calculated in accordance with GAAP.

Financial Tables follow.

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Condensed Consolidated Statements of Income (Loss)

For the Three and Nine Months Ended September 30, 2015 and 2014

Reconciliation of GAAP EPS to Cash EPS

For the Three and Nine Months Ended September 30, 2015 and 2014

Reconciliation of GAAP EPS to Cash EPS

For the Three Months Ended September 30, 2015 and 2014

Management uses non-GAAP financial measures internally for strategic decision making, forecasting future results and evaluating current performance. By disclosing non-GAAP financial measures, management intends to provide investors with a meaningful, consistent comparison of the company’s core operating results and trends for the periods presented. Non-GAAP financial measures are not prepared in accordance with GAAP. Therefore, the information is not necessarily comparable to other companies and should be considered as a supplement to, not a substitute for, or superior to, the corresponding measures calculated in accordance with GAAP.

Reconciliation of GAAP EPS to Cash EPS

For the Nine Months Ended September 30, 2015 and 2014

Management uses non-GAAP financial measures internally for strategic decision making, forecasting future results and evaluating current performance. By disclosing non-GAAP financial measures, management intends to provide investors with a meaningful, consistent comparison of the company’s core operating results and trends for the periods presented. Non-GAAP financial measures are not prepared in accordance with GAAP. Therefore, the information is not necessarily comparable to other companies and should be considered as a supplement to, not a substitute for, or superior to, the corresponding measures calculated in accordance with GAAP.

Statement of Revenues - by Segment

For the Three and Nine Months Ended September 30, 2015 and 2014

(In millions)

Reconciliation of GAAP Cost of Goods Sold to Non-GAAP Cost of Goods Sold - by Segment

For the Three and Nine Months Ended September 30, 2015

(In millions)

4.1 Cost of goods sold (a)

Consolidated Balance Sheet and Other Data

(In millions)

5.1 Cash

Organic Growth - by Segment

For the Three Months Ended September 30, 2015

(In Millions)

Same Store (SS): This measure provides growth rates for businesses that have been owned for one year or more. .

((Current Year Total product sales – acquisitions within the last year + YoY FX impact) - (Prior Year Total product sales – divestitures & discontinuations))/(Prior Year Total product sales – divestitures & discontinuations)

Pro Forma (PF): This measure provides year over year growth rates for the entire business, including those that have been acquired within the last year.

((Current Year Total product sales + YoY FX impact) – (Prior Year Total product sales + Pro Forma impact of acquisitions within the last year - divestitures or discontinuations))/(Prior Year Total product sales + Pro Forma impact of acquisitions within the last year - divestitures or discontinuations).