Articles: tinnitus-drug-therapy.
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Randomized Controlled Trial Clinical Trial
The inhibitory effect of intravenous lidocaine infusion on tinnitus after translabyrinthine removal of vestibular schwannoma: a double-blind, placebo-controlled, crossover study.
Intravenous infusion of lidocaine has previously been demonstrated to have a transient inhibitory effect on tinnitus in 60% of individuals. The site of action has variously been proposed as the cochlea, the cochlea nerve, and the central auditory pathways. To determine whether a central site of action exists, this study investigated the effect of intravenous infusion of lidocaine in individuals with tinnitus who had previously undergone translabyrinthine excision of a vestibular schwannoma, which involves division of the cochlear nerve. ⋯ Intravenous infusion of lidocaine has a statistically significant inhibitory effect on tinnitus in patients who have previously undergone translabyrinthine removal of a vestibular schwannoma. The site of action of lidocaine in this instance must be in the central auditory pathway, as the cochlear and vestibular nerves are sectioned during surgery, and this finding has important implications for the task of identifying other agents that will have a similar tinnitus-inhibiting effect.
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Despite the development of sophisticated diagnostic procedures and treatments for other otologic and neurotologic conditions, tinnitus remains difficult to manage. Several investigators have shown that lidocaine has an effect on temporarily (for several minutes) relieving subjective tinnitus, but few reports have described the response to lidocaine according to different individual patient characteristics. Over a 24-year period, we administered either 60 or 100 mg of intravenous lidocaine to 117 ears in 103 patients with subjective tinnitus (14 patients received treatment bilaterally). ⋯ The 100-mg dose was more effective than the 60-mg dose in completely eliminating tinnitus (34.9 vs 20.6%), but the two doses were comparable when elimination rates were combined with rates of reduction of tinnitus (71.1 and 70.6%, respectively). With respect to individual patient characteristics, ears with low- to middle-tone tinnitus had a better response, as did ears in which the hearing level was 40 dB or higher and ears of patients aged 60 years and older. The response to lidocaine was not correlated with the baseline loudness of tinnitus or to its duration.
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A FREQUENTLY MISUNDERSTOOD AFFECTION: Because of its high prevalence and the considerable alteration it often provokes in quality of life, tinnitus aurium is an important public health problem. Current treatment of tinnitus aurium is limited by the lack of knowledge of the physiopathological processes that generate it.
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Reg Anesth Pain Med · Jan 2000
Case ReportsProlonged suppression of tinnitus after peripheral nerve block using bupivacaine and lidocaine.
The local anesthetic lidocaine has been shown to suppress tinnitus, albeit very temporarily, when administered intravenously. Long-term suppression by local anesthetics has not been reported. Bupivacaine has not been studied. Here we report a case of prolonged (1-month) suppression of tinnitus following a peripheral nerve block performed with lidocaine and bupivacaine. ⋯ There are no reports regarding the use of bupivacaine for suppression of tinnitus. Although previous reports studying lidocaine for this purpose have shown only a brief effect, the use of bupivacaine or a combination of lidocaine and bupivacaine, as in this case, may represent a treatment for tinnitus that is worth further investigation. There currently is no effective long-term therapy for this debilitating problem.
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Auris, nasus, larynx · Oct 1999
Clinical TrialLidocaine test in patients with tinnitus: rationale of accomplishment and relation to the treatment with carbamazepine.
There is strong evidence in the literature about the effect of local anesthetics such as lidocaine in controlling tinnitus; these agents act by stabilizing hair cell membrane and cochlear nerve fibers. However, the effect of intravenous lidocaine is transient, and its oral analog (tocainide) does not have the same efficacy for long-term treatment in patients with tinnitus. Some oral anti-epileptic drugs (carbamazepine, for instance) have been used alternatively in several studies. The aim of this work is to evaluate the response to intravenous lidocaine in patients with intractable tinnitus and the effect of oral carbamazepine in long-term maintenance of tinnitus relief. ⋯ The authors conclude that intravenous lidocaine is effective in reducing intractable tinnitus and that there is a close association between lidocaine and oral carbamazepine effects. Therefore, carbamazepine can be used for the treatment of tinnitus when the patient achieves improvement of symptom after the lidocaine test.