Exhibit 99.3

LETTER TO BROKERS, DEALERS

COMMERCIAL BANKS, TRUST COMPANIES

AND OTHER NOMINEES

Offer to Exchange

Each Outstanding Share of Common Stock

(Including the Associated Rights to Purchase Preferred Stock)

of

Allergan, Inc.

for

$72.00 in cash and

0.83 Common Shares of Valeant Pharmaceuticals International, Inc.,

subject to the election and proration procedures described in the Offer to Exchange and the

related Letter of Election and Transmittal,

by

AGMS Inc.,

a wholly owned subsidiary

of

Valeant Pharmaceuticals International, Inc.

THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON AUGUST 15, 2014, UNLESS THE OFFER IS EXTENDED.

June 18, 2014

To Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees:

We have been engaged by a wholly owned subsidiary of Valeant Pharmaceuticals International, Inc. (“Valeant”), which is offering, upon the terms and subject to the conditions set forth in the enclosed Offer to Exchange and related Letter of Election and Transmittal (together, the “Offer”), to exchange for each issued and outstanding share of common stock of Allergan, Inc., at the election of the holder:

• $72.00 in cash and 0.83 common shares of Valeant;

• the Cash Election Consideration specified on the cover page of the Offer to Exchange; or

• the Stock Election Consideration specified on the cover page of the Offer to Exchange,

subject in each case to the election and proration procedures described in the Offer to Exchange and the related Letter of Election and Transmittal.

YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS AS PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW YORK CITY TIME, ON AUGUST 15, 2014, UNLESS THE OFFER IS EXTENDED.

For your information and for forwarding to your clients for whose accounts you hold shares of Allergan common stock registered in your name or in the name of your nominee, we are enclosing the following documents:

1. The Offer to Exchange;

2. The related Letter of Election and Transmittal for your use in accepting the Offer and tendering shares of Allergan common stock and for the information of your clients;

3. A notice of guaranteed delivery to be used to accept the Offer if the certificates evidencing shares of Allergan common stock and all other required documents are not immediately available or cannot be delivered to American Stock and Transfer Company, LLC (which is acting as exchange agent) by the expiration time of the Offer or if the procedure for book-entry transfer cannot be completed by the expiration time of the Offer;

4. A printed form of letter which may be sent to your clients for whose accounts you hold shares of Allergan common stock registered in your name or in the name of your nominee, with space provided for obtaining such clients’ instructions with regard to the Offer; and

5. A return envelope addressed to the exchange agent, for your use only.

Any inquiries you may have with respect to the Offer should be addressed to, and additional copies of the enclosed materials may be obtained from, the information agent at the addresses and telephone numbers set forth on the back cover of the Offer to Exchange.

Very truly yours,

Barclays Capital Inc.

NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU THE AGENT OF VALEANT, THE DEALER MANAGER, MACKENZIE PARTNERS, INC. AS THE INFORMATION AGENT OR THE EXCHANGE AGENT OR ANY AFFILIATE OF ANY OF THEM OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY DOCUMENT OR MAKE ANY STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE OFFER OTHER THAN THE ENCLOSED DOCUMENTS AND THE STATEMENTS CONTAINED THEREIN.

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