At Altasano, ketamine infusions are administered through an IV, with an infusion pump over 40-60 minutes. Intramuscular ketamine is a popular route of administration for those who may not be as comfortable with IVs, however receiving ketamine IM, means that the dosing and effect is less predictable and it cannot be stopped. Once an IM dose is given, the drug must take its course. Whereas, with an IV route, the infusion can be given slowly and the effects can be dealt with gradually. The IV can also be stopped at any time.