The revised dosage applies as soon as it has been approved by our medical team. If you would like to start straight away, you can use any remaining medication from your current prescription to make up the difference. Once you have four weeks' supply remaining, please submit your request for another prescription. If you would prefer, you can wait until your current prescription has been used up at the current dosage prior to increasing the amount. If you choose this option, please let us know when you started taking the revised dosage when submitting any subsequent blood test results, so that we can accurately monitor any changes.