Imagine that you could take heroin _without_ developing a tolerance to it. People could take opioids for pain management would be able to lower their dosage (and reduce cost). Addicts wouldn't have to buy as much or as often, therefore reducing the financial pressure to commit crime.
Well, there now exist drugs, such as proglumide and memantine which appear to prevent or reverse opiate tolerance.
"However, many people are unaware that both enhanced effectiveness of narcotic analgesics AND prevention or reversal of tolerance is readily achievable through the oral use of up to 200-250 mg of Proglumide [(DL)-4-Benzamido-N,N-dipropylglutaramic acid]. [See Ott 1999; Watkins et al. 1984]
The work of Watkins suggests there may be a therapeutic dosage window with diminished results above it but more detailed work to define this is apparently lacking.
Rather than simply augment the action of the opiates, proglumide actually interferes with the anti-opioid activity of the neuropeptide CCK.
The chronic administration of opiates, or spinal cord and other CNS injuries, elevates the level of Cholecystokinin (CCK) that is present. Such elevated levels exert an antagonistic effect on opioid activity resulting in significantly diminished analgesic effects. (Watkins et al. 1984; Xu et al. 1993 & 1994)
It is this rise in CCK levels that directly leads to the condition known as drug tolerance and the corresponding increase in its anti-opioid activity that requires the opiate user to use increasingly larger amounts to achieve the same effects.
This anti-opiate effect can be prevented or even reversed through the administration of CCK inhibitors such as proglumide. (Watkins et al. 1984)"
https://www.opioids.com/proglumide/index.html
Well, there now exist drugs, such as proglumide and memantine which appear to prevent or reverse opiate tolerance.
"However, many people are unaware that both enhanced effectiveness of narcotic analgesics AND prevention or reversal of tolerance is readily achievable through the oral use of up to 200-250 mg of Proglumide [(DL)-4-Benzamido-N,N-dipropylglutaramic acid]. [See Ott 1999; Watkins et al. 1984]
The work of Watkins suggests there may be a therapeutic dosage window with diminished results above it but more detailed work to define this is apparently lacking.
Rather than simply augment the action of the opiates, proglumide actually interferes with the anti-opioid activity of the neuropeptide CCK.
The chronic administration of opiates, or spinal cord and other CNS injuries, elevates the level of Cholecystokinin (CCK) that is present. Such elevated levels exert an antagonistic effect on opioid activity resulting in significantly diminished analgesic effects. (Watkins et al. 1984; Xu et al. 1993 & 1994)
It is this rise in CCK levels that directly leads to the condition known as drug tolerance and the corresponding increase in its anti-opioid activity that requires the opiate user to use increasingly larger amounts to achieve the same effects.
This anti-opiate effect can be prevented or even reversed through the administration of CCK inhibitors such as proglumide. (Watkins et al. 1984)"
https://www.opioids.com/proglumide/index.html