What is the maximum dose of sildenafil? The maximu dose approved in Singapore is 100mg. Therefore, it is not recommended more than 100mg (ie. one tablet) in a day. By admin|2021-03-10T04:05:14+08:0010/03/2021|Erectile Dysfunction| Share This Story, Choose Your Platform! FacebookTwitterRedditLinkedInWhatsAppTumblrPinterestVkXingEmail About the Author: admin Leave A Comment Cancel replyYou must be logged in to post a comment.