Medical use of nitrous oxide is in a 50/50 mixture of medical grade oxygen and medical grade (highly purified) nitrous oxide. This is called Entonox in many countries and the most difficult part of the process is not making the nitrous oxide but the subsequent purification. read more
Nowadays, the process to make nitrous oxide is by and large the same it was a couple of centuries ago. However, if you are looking to make nitrous oxide gas, it is important that you have prior experience of making gases in the chemistry lab, because the process is not exactly safe. read more
Nitrous oxide is a safe lab gas, but overexposure via inhalation may result in asphyxiation, in much the same way as overexposure to helium gas presents a risk. read more