My daughter has had ketamine inpatient twice...both times for 5 days (continuous infusion) and then a day before to build up to that level and 2 days after to slowly come down. She has done great with it. She gets boosters as needed. I agree, you have to be calm and go into it with a positive outlook and stay relaxed and focused. She takes an ipod with relaxing music or mediative chants, headphones to block out other noise and sunglasses or eye shades. Nurses are told to leave her alone as much as possible. Afterwards, she takes xanax for a few days to stay calm and relaxed.