I'm using hydroquinone based cream twice daily on first 2 weeks & once on next 2 weeks. Now using 2-3 days gap. Is it fine using like this?

See answer. If not used on a daily basis you may not achieve or maintain the skin lightening effect you desire. Also see the following sites for precautions/advice on hydroquinone: http://bit.ly/1S8Du5c http://wb.md/1PAfzLl http://bit.ly/1xjIWGO.