Not likely to do much. People take 200mg at a time and so that is not even 4x dose. Also OD on much stronger medications are not even a reliable method. Unfortunately this is not a viable method. The LD50 on that medication is upwards of 400mg/kg so even if an outstandingly high dose of say 30 grams of that medication, it still would be 50-50. In a 40 year period there were about 20 documented cases of OD leading to death with that medication but there are a ton of other factors such as health, age, other substance consumption etc. Way too many variables and definitely not reliable.
Should be avoided as a method.
I hope you find everything you are looking for and get peace & serenity with whatever you decide.