Ketamine and Opioid-Induced Hyperalgesia

A September 2026 narrative review in Revista Veritas de Difusão Científica looks at opioid-induced hyperalgesia: a paradoxical rise in pain sensitivity after opioid exposure. The authors center the NMDA receptor, the same receptor system often discussed when people ask how ketamine differs from a standard pain pill. The paper is a review of mechanisms and perioperative research. It is not a trial of depression treatment, and it is not a protocol for our Aventura clinic.

That still matters for patients comparing ketamine infusion in Miami options, especially people whose pain story includes long opioid use. Care here starts with a consult. Fully guided sessions are available. We are locally owned, and we see people from Miami, Fort Lauderdale, and the rest of South Florida. ¡Hablamos Español!

Opioids are prescribed to reduce pain. In some settings, exposure is linked to the opposite pattern: the nervous system becomes more sensitive, so the same stimulus hurts more. Clinicians call that opioid-induced hyperalgesia. It is not the same thing as tolerance, where a higher dose is needed for the same effect, and it is not the same thing as withdrawal.

The review describes a network around the NMDA receptor, including glial activation and inflammatory signals that may amplify sensitization. Diagnosis in real patients is harder than the definition. Other causes of worse pain have to be ruled out. A paper cannot tell you that your pain is hyperalgesia.

Ketamine is a noncompetitive NMDA channel blocker. At subanesthetic doses it reduces excitatory transmission. The authors note that ketamine and magnesium have the most direct mechanistic tie to that receptor among the agents they discuss. In remifentanil anesthesia research, NMDA antagonists have been linked to lower pain scores and higher satisfaction, but the protocols are mixed.

Broader perioperative evidence suggests intravenous ketamine can reduce acute postoperative pain and opioid use, especially after painful surgery and in people who already take opioids. The review is explicit about the limit: that supports an opioid-sparing role. It does not prove the benefit is prevention of opioid-induced hyperalgesia.

Operating-room ketamine is not the same visit as a private infusion room in Aventura. Dose, monitoring, and goal are different. The review does not say ketamine replaces opioids, cures chronic pain, or belongs in every pain plan. People with uncontrolled blood pressure, unstable substance use, or other medical issues may not be candidates. Screening comes first.

If chronic pain is the reason you are looking, start on our chronic pain page, then the services overview. The Aventura clinic is the Miami-metro office, not a mail-order program. Directions and parking are on the location page.

We do not turn a narrative review into a sales claim. If someone has been on opioids and pain is worse, not better, that history belongs in the intake. So do current medicines, sleep, mood, and what has already been tried. Ketamine may be one option after that review. It may not.

The practical reading of this paper is modest. NMDA research helps explain why ketamine is discussed in pain medicine at all. It does not pick your dose, your number of sessions, or your outcome. Individual results vary. Fully guided sessions are available when someone wants more support in the room.