For security disable password authentication - use public key instead, disable root login via ssh - use sudo or su from another user.
To reduce the number of attempts of others trying to get in change the ssh port and/or set-up fail2ban.
You could also set a firewall rule to only allow ssh from your IP address, if you have a static address at home and only need access from there, or have a way to VPN into your home network. Make sure you have a static address if you do this though, you don’t want your IP to change and be left locked out of your server.
Is this for cancer drugs or generics in general? Only asking because most of the generics I see in the UK are made here, but that might be because I’ve only seen the more common medications and not stuff like cancer drugs.
Hope you manage to beat the cancer!