We are seeing many ATHENA requests for MedDRA. So, before you click you may want to figure out whether you already have a license, and obtain one if not:
MedDRA is licensed by the MSSO. You have to go through their process to obtain a license. If you are an academic or public organization you will get the license for free. If you are private sector you'll have to cough up some money. Most pharmaceutical, biotech and device companies typically have already a MedDRA license in place, because the vocabulary is used heavily for clinical trials.
When you have the license, visit Athena and click on MedDRA. We will get an email notification, ask you for your license proof, and switch your access on.