Maprotiline chemical structure of maprotiline
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Mefenamic acid
Metamizole sodium
MS Contin


Maprotiline (sold as Deprilept®, Ludiomil®, Psymion®) is a tetracyclic antidepressant. It is a stong norepinephrine reuptake inhibitor with only weak effects on serotonin and dopamine reuptake.

It exerts blocking effects at the following postsynaptic receptors:

  • Strong : alpha1
  • Moderate : 5-HT2, muscarinic, H1, D2
  • Weak : alpha2
  • Extremely weak : 5-HT1

The pharmacologic profile of Maprotiline explains its antidepressant, sedative, anxiolytic, sympatholytic, and anticholinergic activities. Additionally, it shows a strong antagonism against Reserpine-induced effects in animal studies, as the other 'cassical' antidepressants do. Although Maprotiline behaves in most regards as a 'first generation antidepressant' it is commonly referred to as 'second generation antidepressant'.

Sedation has a fast onset (the same day), while remission of the depression itself is noted usually after a latent period of 1 to 4 weeks.

Maprotiline does not brighten up the mood in nondepressed persons.


Maprotiline was developed and has been marketed by the Swiss manufacturer Geigy (now Novartis) since the early 1980's under the brand name Ludiomil®. Generics are widely available.


  • Treatment of depressions of all forms and severities (endogenous, psychotic, involutional, and neurotic)
  • Treatment of the depressive phase in bipolar depression
  • For the symptomatic relief of anxiety, tension or insomnia

N.B. The use of Maprotiline in the treatment of Enuresia in pediatric patients has so far not been systemetically explored and its use can therefore not be recommended.



  • Hypersensitivity to Maprotiline or to other tri-/tetracyclic antidepressants
  • Hypertrophy of the prostate gland with urine hesitancy
  • Closed Angle Glaucoma

Special caution needed

  • Concomitant treatment with a MAO-Inhibitor
  • Serious impairment of liver and kidney function
  • Epilepsy and other conditions that lower the seizure threshold (active brain tumors, alcohol withdrawal, other medications)
  • Serious cardiovascular conditions (arrhythmias, heart insufficience, state after myocardial infarction etc.)
  • Treatment of patients under age 18

Pregnancy and nursing

If you are pregnant or thinking of becoming pregnant, before taking this medicine talk to your doctor about the benefits versus the risks to your pregnancy. Animal studies showed delayed bone development. Use this medicine only if it is clearly needed.


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Treatment of postherpetic neuralgia: a systematic review of the literature - Original Research
From Journal of Family Practice, 2/1/02 by Brian S. Alper

* OBJECTIVES We wanted to determine whether any treatment had been shown to reduce pain or disability from postherpetic neuralgia (PHN), a common sequela of herpes zoster in elderly patients.

* STUDY DESIGN We undertook a systematic review of English-language randomized controlled trials (RCTs) of treatments of PHN with evaluation periods longer than 24 hours.

* DATA SOURCES We systematically searched MEDLINE, Current Contents, and the Cochrane Library. We also searched reference lists of identified trials and reviews and contacted content experts.

* OUTCOMES MEASURED Two reviewers independently evaluated RCTs for methodologic quality and data extraction. Outcomes of primary focus were pain and quality of life.

* RESULTS Twenty-seven RCTs met inclusion criteria and were reviewed. Six trials of tricyclic antidepressants found evidence for clinically meaningful effects over 6 weeks. All other treatments were evaluated in no more than 2 trials meeting our inclusion criteria. Topical capsaicin 0.075%, gabapentin, and controlled-release oxycodone were shown to be effective, but the clinically meaningful benefit is difficult to quantify. Intrathecal methylprednisolone and possibly bupivacaine sympathetic blocks are helpful in refractory cases. Other treatments evaluated, including topical lidocaine, had no evidence or inconsistent evidence of benefit.

* CONCLUSIONS No single best treatment for PHN is known. Tricyclic antidepressants, topical capsaicin, gabapentin, and oxycodone are effective for alleviating PHN; however, long-term, clinically meaningful benefits are uncertain and side effects are common. Patients with PHN refractory to these therapies may benefit from intrathecal methylprednisolone. Little evidence is available regarding treatment of PHN of less than 6 months' duration.

* KEY WORDS Postherpetic neuralgia [non-MeSH]; pain; zoster; therapy; systematic review [non-MeSH]. (J Fam Pract 2002; 51:121-128)

Postherpetic neuralgia (PHN), the most common complication of herpes zoster, is much more prevalent among adults older than 50 years than in younger people. (1,2) The largest English-language prospective study of patients presenting with zoster suggests that the average family physician can expect to see 4 cases of zoster per year and 1 case of PHN lasting more than 3 months every 3 years. (3) Among placebo cohorts from randomized controlled trials (RCTs) of acute zoster treatment, the incidence of pain at 3 months has been reported as 17% to 60%; at 6 months, 5% to 39%. (4) There is limited evidence that therapies for acute zoster have an impact on PHN. (4)

This review addresses therapies to reduce pain or improve quality of life in patients with PHN. The condition has been variously defined in terms of timing (either following resolution of acute zoster [rash healing] or a defined time after onset of zoster), duration (any time after zoster or a minimum of 6 months after zoster), and type of pain (such as lancinating pain or allodynia [pain caused by a stimulus that does not normally provoke pain]). (5,6) PHN may include a spectrum of presentations, from brief intermittent mild pain that resolves spontaneously to chronic persistent disabling pain recalcitrant to multiple therapies. To avoid missing potentially relevant findings, we defined PHN broadly as any pain after cutaneous healing of zoster.


Search Strategy

Medline (1966 to present) was searched on October 19, 2000. The search combined the terms "post-herpetic or postherpetic" and "neuralgia or neuropathy or pain" and publication type "clinical trial (including phases I to IV) or controlled clinical trial or randomized controlled trial." The Cochrane Controlled Trials Registry 2000, Issue 3, was searched with the same terms. Current Contents was searched to identify more recent references. We also identified trials through article reference lists (from included trials and 40 reviews), contact of authors and content experts, and the Food and Drug Administration (FDA) Web site.

Selection Criteria

Inclusion criteria for this review were RCTs that enrolled patients with PHN (history of zoster, pain in the dermatomal distribution of the zoster rash, and pain persisting or occurring after resolution of the zoster rash), addressed relevant end points (pain resolution, pain severity, effect on quality of life), and had full reports available in English. Since responses to initial therapy may change over time, we included only trials with evaluation periods lasting more than 24 hours.

The authors independently evaluated trials meeting these inclusion criteria for quality and independently extracted data. Quality was evaluated using the Jadad scale, (7) which addresses selected criteria (randomization technique, allocation concealment, blinding, accounting of dropouts) and rates methodologic quality on a 5-point scale, with 5 representing the highest score. Differences were resolved through discussion. Trials scoring only 1 point were excluded except for 2 instances noted in our discussion.


Searching identified 186 potential trials, of which 92 were excluded as irrelevant on the basis of titles and abstracts alone. Of the 94 citations reviewed in greater detail, 64 were excluded for the following reasons: not describing a trial (10), not describing a trial of treatment for PHN (10), describing an uncontrolled trial (7), no randomization (7), evaluation period limited to 24 hours or less (13), duplicate publication (4), language other than English (7), not providing results specifically for patients with PHN (3), and available only in abstract form (3). One unpublished trial of mexiletine was identified through a review by Hanania and Brietstein; Dr Hanania informed us, however, that this trial had been stopped early because the treatment group had experienced serious side effects. One controlled trial was excluded because correspondence with the investigator did not confirm that it had been randomized. One trial was excluded because it included only 6 patients with PHN. (A list of excluded studies is available in Table W1 at

Of the remaining 27 trials reviewed for methodologic quality, most (16) received a Jadad score of 4. The 2 authors had substantial agreement on quality ratings ([kappa] = 0.75). Table W2 (available online at provides details of treatment regimens, quality ratings, ages of subjects, and duration of PHN. One trial with a Jadad score of 1 was excluded. (8) Most subjects were elderly and had had PHN for longer than 6 months.

Topical Therapies

Topical therapies evaluated were lidocaine, capsaicin, and benzydamine (Table 1). Lidocaine patch therapy is the only agent with a specific FDA indication for PHN. We found few trials supporting the FDA approval. The only published RCT of relatively unselected patients with PHN (n = 35) showed significant benefit versus placebo but was excluded because evaluation sessions had been limited to 12 hours. (9) We reviewed a report of an unpublished RCT comparing lidocaine patch with vehicle placebo used in the application for FDA approval. (10) This trial found a large, statistically significant reduction in pain scores with placebo throughout the 3- to 4-week trial. This trial found a similar statistically significant reduction in pain scores with lidocaine patch and no significant difference comparing lidocaine patch with placebo.

Three findings in the unpublished trial were used to support arguments for efficacy: (1) a statistically significant difference in the pain relief score at the final visit; (2) differences in allodynia (based on investigators' sensory skin testing, described as stroking the maximally painful area with a foam brush and recording the pain scale rating) at the beginning of the trial; and (3) a greater increase in pain scores among lidocaine subjects upon trial conclusion (ie, after stopping study medication). The clinical relevance of these 3 findings is unclear.

The FDA declined to approve lidocaine patch therapy on the basis of these 2 studies and required an additional trial to demonstrate benefit. An "enriched enrollment study" involved subjects who had used lidocaine patch for at least 1 month and received at least moderate relief but had pain without the patch. (11) Lidocaine patch was clearly effective in this highly selected cohort.

Capsaicin 0.075% cream was effective in 2 trials of patients with severe refractory PHN. (12,13) The benefit appeared modest in the larger trial (pain was eliminated or nearly eliminated in less than 20% of capsaicin patients) and greater in the smaller trial. Blinding had limited efficacy because of the stinging effect of capsaicin.

Benzydamine cream, an antiprostaglandin, was not effective in a 2-week crossover trial. (14) The cream showed a nonsignificant trend for pain reduction in an earlier 2-week crossover trial. (15)

Oral Therapies

Oral therapies evaluated were tricyclic antidepressants, gabapentin, oxycodone, tramadol, dextromethorphan, memantine, acyclovir, lorazepam, and fluphenazine (Table 1).

Tricyclic antidepressants have been shown to be effective in multiple small short-term crossover trials. Amitriptyline was highly effective in 2 placebo-controlled trials. (16,17) In 1 of these trials, amitriptyline was more effective than lorazepam. (16) In another trial, amitriptyline was more effective than fluphenazine (a phenothiazine) and glycopyrrolate placebo. (18) Nortriptyline was as effective as amitriptyline in a comparison trial, (19) while maprotiline was not. (20) Desipramine was highly effective in a trial using benztropine as an "active placebo" in that the anticholinergic properties of benztropine were used to match the side effects of desipramine. (21) In all these studies, the analgesic effects of tricyclic antidepressants appeared independent of antidepressant effects. No randomized trial data were collected to assess the use of antidepressants for longer than 8 weeks.

Gabapentin, an anticonvulsant, was effective in a single large placebo-controlled trial. (22) The number needed to treat (NNT) was 3.2 for the outcome of moderate or better pain relief and 13.9 for the outcome of no pain during the eighth week of treatment. The proportion of patients whose pain was much improved or who had no pain was not reported.

Controlled-release oxycodone was effective in a crossover trial in which 45% of patients had previously used opioids. (23) Tramadol may be effective but was not compared against placebo. (24) High-dose dextromethorphan, an N-methyl-D-aspartate (NMDA) receptor antagonist, was not shown to be effective for PHN in a small crossover trial. (25) Memantine, another NMDA antagonist, was also ineffective. (26) Acyclovir did not show any greater efficacy than placebo in a small trial. (27) Lorazepam and fluphenazine did not show statistically significant benefit in comparison with placebo in the amitriptyline trials. (16,18)

Other Therapies

Other therapies evaluated were vincristine iontophoresis, acupuncture, intrathecal methylprednisolone, and subcutaneous administration of a mixture of gangliosides (Table 1).

Iontophoresis is a process whereby topical medications are applied via electricity. Vincristine iontophoresis was no more effective than saline iontophoresis in one small trial. (28) Vincristine and dimethylsulfoxide iontophoresis was effective at reducing but not eliminating pain in another small trial. (29) Dimethylsulfoxide may have an independent analgesic effect. (30)

Acupuncture was no more effective than mock transcutaneous electrical nerve stimulation (TENS) in 1 trial, (31) while a smaller trial suggested a short-term effect. (32)

Intrathecal methylprednisolone acetate plus lidocaine was highly effective for achieving good or excellent results (pain relief > 50%) in patients with longstanding PHN refractory to multiple conventional therapies. (33) All patients whose response to methylprednisolone was poor (8%) had had PHN for more than 5 years. The intrathecal route appears more effective than the epidural route of administration. (34)

A mixture of gangliosides given by subcutaneous injection was more effective than placebo, but poor tolerability and derivation from bovine brain tissue severely limit its acceptability. (35)

Sympathetic blocks using bupivacaine were more effective than intravenous lidocaine infusions in 1 trial, (36) but results were not reported in a fashion that conveys the proportion of patients who improved significantly.


Effective Therapies

The therapy for which evidence for efficacy is best is tricyclic antidepressants. Three placebo-controlled RCTs demonstrated that only 2 to 3 patients with PHN need to be treated to achieve 1 good or excellent result (NNT = 2-3). Since none of these studies lasted longer than 8 weeks, the long-term efficacy of antidepressants for the treatment of PHN is unknown. Follow-up of 10 patients who did well in 1 antidepressant trial found that only 2 patients were still doing well at 2 years. (19)

Other therapies shown to be effective in 1 or 2 trials are topical capsaicin 0.075%, gabapentin, and controlled-release oxycodone. For these studies, it is difficult to determine the number needed to treat for "meaningful" clinical benefit, although gabapentin demonstrated superiority to placebo in numerous quality-of-life measures.

For patients with severe PHN refractory to other treatments, 2 trials support benefit from intrathecal methylprednisolone and 1 trial suggests benefit from bupivacaine sympathetic blocks. Cost data for selected therapies are presented in Table 2.

Therapies Not Proved Effective

Therapies of uncertain benefit that have not been adequately studied in randomized controlled trials include lidocaine patch, benzydamine cream, tramadol, and vincristine (and/or dimethylsulfoxide) iontophoresis.

Therapies unlikely to be beneficial based on single trials include lorazepam, fluphenazine, dextromethorphan, memantine, acyclovir, and acupuncture. Most of the negative trials did not report power; therefore, potential benefits of these treatments cannot be excluded.

Safety and Tolerability

The rates of adverse effects are high in all effective oral and topical therapies (Table 1). This situation is of special concern in elderly patients who have comorbid conditions and are taking multiple medications. Two tricyclic antidepressant trials (16,21) report a decreased incidence of side effects over time. The researchers emphasize the importance of starting at the lowest available dose with oral therapies and titrating slowly as indicated and tolerated.

No clinical complications were observed in the intrathecal steroid trials; specific side effects were not reported.

Lidocaine patch therapy has been promoted as causing clinically insignificant serum levels, no systemic side effects, and no drug--drug interactions. (11) However, the largest lidocaine patch RCT was too small to rule out significant but uncommon risks such as ventricular arrhythmia. (10) One death that could potentially be attributed to lidocaine absorption occurred in a patient with diffuse vascular disease who was on chronic hemodialysis for renal failure. Blood lidocaine levels were not obtained because venous access was poor.


Variations in outcomes limit comparative conclusions. Sindrup and Jensen (37) reviewed treatments for neuropathic pain and presented data based on a successful outcome defined as 50% reduction in pain scores, 50% pain relief, or categorical ratings of excellent, good, or moderate pain relief. Most studies used visual analog scales, but it is not clear that a 50% reduction in these measures is equivalent to clinically meaningful benefits at all levels of pain. We attempted to determine NNT data based on clearly meaningful outcomes such as "excellent or good," "complete," or "marked" pain relief as distinct from "moderate" or "some," but found these data unavailable in most reports. Quality-of-life measures, such as sleep and disability ratings, may be more important than measures of pain, but were reported in only one third of the trials.

We may have failed to include relevant trials. We identified 7 potentially relevant non-English language studies. Five had no abstracts available. (38-42) One single-blind trial reported reduced pain scores with topical prostaglandin E1 dissolved in Vaseline. (43) One trial compared iontophoresis with lidocaine and iontophoresis with 3 different calcium channel blockers in 10 patients. The authors found that all 4 treatments reduced pain, but had not included a placebo control group. (44) We also contacted 15 content experts to identify reports of unpublished trials; none of the 6 responses received identified such reports.

The evidence base for treatment of PHN is limited. Among the RCTs reviewed, 78% enrolled 50 or fewer patients. Because most of the subjects had PHN lasting longer than 1 year, our conclusions may not apply to patients with PHN of shorter duration. The latter group represents the majority of subjects with PHN presenting to primary care physicians.

We used the Jadad scale (7) as an attempt to quantitatively assess the methodologic quality of the studies we reviewed. In general, explicit validity checklists with summary scores have not consistently been shown to provide more reliable assessments of validity than qualitative assessments. (45-47) The Jadad scale is the first validity checklist that has some rigorous evidence supporting its use, (7,48) although its inter-rater reliability has been questioned. (49) We found the Jadad scale had an inherent bias against therapies that could not be adequately double-blinded. Thus 2 trials with a score of 1 were included. (29,36) In 1 trial of vincristine iontophoresis, the authors described the trial as single-blinded and provided ample explanation of why double-blinding was not achieved. (29) In 1 trial of sympathetic blocks, the treatment studied included an invasive procedure; therefore, there was no apparent way for the procedure itself to be double-blinded. (36)

The Jadad scale does not account for some threats to validity of included studies. We encountered numerous methodologic flaws, such as lack of intention to treat analysis in parallel trials (11) and lack of washout periods in crossover trials (4). Further limitations to interpretation of selected study results included potentially significant baseline differences between groups (8), small numbers, and short study durations. A list of the studies with these specific methodologic concerns is available in Table W3 at


For patients with PHN lasting less than 6 months, spontaneous resolution is common and treatment decisions are largely empiric and not evidence based. For PHN of longer duration, treatments shown to be more effective than placebo include tricyclic antidepressants, topical capsaicin 0.075%, gabapentin, and controlled-release oxycodone. These treatments all have adverse effects or costs that need to be considered on an individual basis. Lidocaine patch therapy may be safer for most patients but may be no more effective than placebo and is not suitable for patients with trigeminal PHN. Patients with PHN refractory to the currently available and studied topical and oral agents should be considered for intrathecal steroid therapy.


* Spontaneous resolution is common in patients whose postherpetic neuralgia (PHN) has lasted for less than 6 months; treatment decisions are largely empiric and not evidence based.

* For PHN of longer duration, treatments shown to be more effective than placebo include tricyclic antidepressants, topical capsaicin 0.075%, gabapentin, and controlled-release oxycodone. Benefits should be weighed against adverse effects and costs.

* Patients with PHN refractory to currently available and studied topical and oral agents should be considered for intrathecal steroid therapy.


The authors wish to thank Susan Meadows, MLS, Susan Elliott, MLS, Stacey Rautzhan, and Steve Calloway, RPh, for their assistance and Sigurdur Helgason, MD, Carin Reust, MD, Steven Zweig, MD, MSPH, and Alan Adelman, MD, MS, for editorial review.


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* Submitted, revised, September 10, 2001.

From the Department of Family and Community Medicine, University of Missouri-Columbia School of Medicine (B.S.A.), and the Department of Family and Community Medicine, Penn State College of Medicine, The Milton S. Hershey Medical Center, Hershey, Pennsylvania (P.R.L.). The authors report no competing interest. This study was supported in part through a training grant from the Bureau of Health Professions Awards (DHHS 1-D14-HP-00029-01) from the Health Resources and Services Administration to the Department of Family and Community Medicine, University of Missouri-Columbia. Requests for reprints should be addressed to Brian S. Alper, MD, MSPH, Department of Family and Community Medicine, University of Missouri-Columbia School of Medicine, Columbia, MO 65212. E-mail:

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