You will be asked to lie down during ketamine administration because your sense of balance and coordination will be adversely affected until the drug’s effect has worn off (i.e., typically between two to four hours after the administration). It is possible you may fall asleep. Visual, tactile, and auditory processing are affected by ketamine. Music may be perceived in a novel fashion. Synesthesia (i.e., a mingling of the senses) may occur. Time may feel sped up, slowed down, or irrelevant.
Other possibilities for adverse effects include:
blurred or uncomfortable vision (you are advised to keep your eye mask on until the main effects have worn off)
diminished ability to hear or to feel objects accurately (including one’s own body)
anxiety, nausea, and vomiting*
*Because of the risk of nausea and vomiting, please refrain from eating and drinking for at least the 2 hours preceding the session. Eat lightly when you do. Hydrate well in that same time frame. If you are unduly nauseated, you may be offered an anti-nausea medication, ondansetron (Zofran), in oral dissolving tablet form.
Ketamine typically causes an increase in blood pressure. If blood pressure monitoring reveals that your blood pressure is too high, you may be offered clonidine to remedy this. Agitation may occur during the course of a ketamine session. If your agitation is severe, you may be ushered into another space where a member of the Internal Family Systems & Ketamine Therapy Retreat staff will sit with you.
The administration of ketamine may also cause the following reactions: tachycardia (elevation of pulse), diplopia (double vision), nystagmus (rapid eye movements), elevation of intraocular pressure (pressure in the eyes) and anorexia (loss of appetite). The above reactions occurred after rapid intravenous administration of ketamine or intramuscular administration of higher doses of ketamine (in a range of greater than 5 mg/kg used for surgical anesthesia). The dose to be used in this sub-anesthetic ketamine experience is much lower (2 mg/kg or less).
There are case reports suggesting that chronic abuse of ketamine in high doses can cause urinary tract symptoms and even permanent bladder dysfunction. This has not been shown to occur with clinically supervised use of ketamine.