I understand that you are concerned about your ability to hold a Class 1 medical certificate as a pilot due to a condition that may have been drug-induced. It's important to note that each case is unique and the outcome can vary depending on the specific details of the case, such as the type of medication and the pilot's medical history.
In Australia, the Civil Aviation Safety Authority (CASA) is responsible for issuing and renewing medical certificates for pilots. They have strict guidelines and standards for pilots with medical conditions and require that all pilots meet the necessary requirements for their medical certification.
It's possible that you may be able to hold a Class 1 medical certificate with conditions or restrictions, depending on the nature and severity of your condition, and how well it's managed by medication.
It's difficult to say what the outcome will be in your case without more information and it's important to consult with a medical professional and/or CASA regarding your specific case.
As for finding other pilots with similar conditions in Australia, it might be hard to find them on a public forum, but you can reach out to CASA or other organizations that represent pilots in Australia, they might be able to provide more information or connect you with a pilot who may have experience with similar conditions.