5mg is OK 'as necessary'. Do you wait until anxiety begins or use it 'in case'? I used 5mg 'in case', i.e. the evening before an Event to enable me to get there. If necessary I had an extra 2mg during the day. But only when I felt anxiety, same with the current emergency medication.
Rescue Remedy is sold in many forms, i.e. mouth spray, sweeties and can be used with other meds.. I use the mouth spray before I go shopping, before the anxiety begins.