TITRATION:
FOR PATIENTS AND PROVIDERS
·
Titration to optimal effect is the central
principle in the treatment of diseases with medications. This principle is
seldom effectively applied to the treatment of chronic pain with opioids, because
of irrational fears of respiratory depression, addiction, and ever-present
threat of regulatory sanctions.
·
Titration of opioids is complete when:
1. The
patient has regained optimal functioning, or
2. Intolerable side effects have occurred.
(This most commonly occurs with morphine or methadone.)
If one of these
conditions has not been met, the patient has been robbed of an opportunity to
lead a healthy life. There is no ceiling dose to limit the use of most opioids
used in the treatment of chronic pain.
·
Uncontrolled pain is a medical emergency. While
it goes under-treated, the patient’s health deteriorates. The current practice
of making patients wait for their next appointment, which is often a month
away, before the next increment in titration, is bad medicine.
·
Dosages should be started low whenever a new
medication is started, even if the patient already has a tolerance to other
opioids. Increments should be smaller at first, allowing the patient to develop
tolerance to undesired side effects, most of which occur at low dosages.
·
In order to avoid the risk of respiratory
depression, the interval between increases must be long enough for the patient
to experience the full effect of the previous dose, which occurs when peak
blood levels are achieved. With IV administration, time to peak blood level is
only a few minutes. With immediate release oral preparations, peak blood levels
occur in 20-30 minutes. With time released medications this takes at least an
hour.
·
If titration is performed at peak blood levels,
only a 25%-100% increment in dosage should be administered. If a full dosing
interval has passed, the dose should be 125%-200% of the previous dose.
·
Pain is a moving target, making titration an
ongoing process from hour to hour, and day to day. The conception that
tolerance to the pain controlling effects of opioids doesn’t or shouldn’t occur
is, in an academic sense, essentially sound, but can be misleading to the
practitioner when a patient’s pain levels increase after a period of stability.
A frequently
overlooked fact in pain management is that as patients recover from long periods of debilitation caused by under
treated or untreated pain, gradually increasing activity levels provoke
corresponding increase in pain levels, and the need for increased dosages of
opioids. Practitioners who don’t anticipate this development are likely to
become suspicious, and balk at performing the necessary titrations, which
usually proceed over the course of several months.
When pain levels
increase unexpectedly, the possibility of progression of disease should be
entertained and evaluated if indicated. Titration should not be withheld.
·
The dosage curve in the treatment of severely
debilitated patients recovering from chronic pain is bell-shaped. Dosages
increase gradually over the course of several months as the patient’s activity
level increases. Once the patient achieves full activity, the nervous system
begins to heal, and dosages can be expected to diminish.
·
Patients will often report satisfaction
with under treatment of pain, for several reasons:
1. They are
afraid of becoming addicted.
2. They feel morally
righteous about keeping their dosages low, not understanding that they do so at
the expense of their health.
3. Many have been tossed out
of practices for complaining about continuing pain, and for asking for more
medication. Half a loaf is better than none.
4. Under treated patients
seldom realize the qualitatively different realm of functioning in which they
would exist if they were titrated properly.
Most profoundly disabled patients have not experienced this, and
understandably have no idea what benefits might result.
Dr. Russell Portenoy is widely recognized as a world
authority on the treatment of chronic pain with opioids. Here is what he has to
say on the subject in Substance Abuse:
A Comprehensive Textbook ed. 3, Lowinson, Joyce H., ed.,
Williams & Wilkins Co, 1997:
Once
an opioid and route of administration are selected, the dose should be
increased until adequate analgesia occurs or intolerable and unmanageable side
effects supervene. There is no ceiling
effect to the analgesia provided by the pure agonist opioid drugs and the
maximal dose is immaterial as long as the patient attains a favorable balance
between analgesia and side effects. This
implies that the opioid responsiveness of a specific pain can only be
ascertained by dose escalation to limiting side effects. In clinical practice, the range of opioid
doses required by patients is enormous.
Doses equivalent to more than 35
g morphine per day have been reported in highly tolerant patients with
refractory cancer pain.
- P. 573,
This therapy remains
controversial and prescribers cannot be assured that those in the regulatory
community will not initiate an investigation, or even issue a sanction, because
of bias against the approach and without regard for the details of the
case.
- P. 582
Concern
about regulatory scrutiny is understandable, and it is likely that dose escalation is sometimes withheld solely in
response to perceived risk of sanctions.
- P. 584
Comments/Opinions
Frank B. Fisher, MD
[email protected]
510-233-3490
Or
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