Actelion Ltd. Invitation to webcast and conference call


ALLSCHWIL, Switzerland, Oct. 23, 2003 (PRIMEZONE) -- Actelion announces the 9 months 2003 results on 28th October 2003.

Actelion Research and Development Day 2003 on 29th October 2003

Dear Friend in the Investment Community

Actelion Ltd will make two announcements next week:


 * Actelion 9 months 2003 results (conference call & webcast)
 * Actelion Research and Development Day 2003 (webcast)

Actelion 9 months 2003 results

Actelion Ltd will release the results of the first nine months of 2003 on Tuesday, 28 October 2003, at 07.00 a.m. CET / 06.00 a.m. GMT / 01.00 a.m. EST.

To discuss these results, Actelion will host an Investor Conference Call and Webcast as follows:

Date/Time: Tuesday, 28 October 2003, 15.30 p.m. CET / 14.30 p.m. GMT / 09.30 a.m. EST

Conference Call Connect #: Dial-in participants should start calling the number below 10-15 minutes before the Conference is due to start. European participants should dial +41 (0)91 610 56 00 U.S. participants should dial +1 (1) 866 291 41 66 U.K. participants should dial +44 207 107 06 11

Participant's mode:

Listen-Only with possibility to open individual lines during Q&A session. Participants will be asked for their Name and Company.

Webcast Access: See section below

Actelion Research and Development Day 2003

On Wednesday, 29 October 2003, Actelion will hold its Research & Development Day 2003 in London. The Actelion R&D day will be repeated the day after, 30 October 2003, in New York.

The Actelion R&D day will be webcasted, to either follow the event live or later as a replay.

Date/Time: Wednesday, 29 October 2003, 10.30 a.m. CET / 09.30 a.m. GMT / 03.30 a.m. EST

Webcast access: Webcast participants should visit the Actelion Website www.actelion.com 5-10 minutes before the conference is due to start. There the respective webcast link can be found.

Participant's mode:

Listen-Only with possibility to ask individual questions by clicking on the Q&A button. E-mail questions will be answered after the call. Participants will be asked to provide their Name and Company.

Webcast Replay: The archived Investor Webcast will be available for replay through www.actelion.com/Apps/WebObjects/Actelion.woa/wa/dp?name=corp_pres approximately 60 minutes after the call has ended.