Although tinnitus is often caused
due to incessant exposure to loud noise, earwax blockage
and senility, certain drugs are also responsible for the
exasperating racket that goes on in a persons ears day
in and day out. However, the truth was unearthed only in
1944 when Streptomycin was discovered and extensively
applied for treating tuberculosis. Apart from the usual
side effects that an antibiotic is often associated
with, the patients treated with streptomycin
demonstrated irreversible cochlear as well as vestibular
tribulations. In other words, they suffered from various
hearing and vertigo related problems.
Can
Prescription Drugs Cause Tinnitus?
Termed Ototoxicity , the
dilemma later became evident with the use of other
antibiotics belonging to the aminoglycoside group also.
What is more, it covered platinum-based chemotherapy
medications, quinine, loop diuretics and even the good
old salicylates that are commonly used as household
medication for treating minor fevers. And almost all of
these carry a relatively high degree of toxicity that
affects the cochleo-vestibulat system. These ototoxic
medications, to be precise, are toxic (harmful) to the
cochlea or vestibular (balance) structure in the ear,
having the potential to cause loss of hearing, tinnitus
as well as dysequilibrium, causing vertigo and related
problems.
However, the modus operandi adapted
by these medications that are ototoxic in nature vary
from drug to drug. The Aminoglycosides appear to
activate the cochlea glutamate
receptors, promoting degeneration of the hair cells as
well as the cochlear neurons. This gives rise to a spill
of damage caused to the free radicals that leads to
further destruction of the hair cells while the cochlear
neurons suffer too.
It may be interesting to note at
this juncture that the destruction initially affects the
outer hair cells belonging to the inner row and then
advances to reach the inner hair cells belonging to the
outer rows. Symptoms usually manifest with termination
of therapy or immediately thereafter. Hearing problems
that are mostly Ototoxicity-induced, it has been
observed, tend to manifest first in higher frequencies
that cause tinnitus. As it progressively covers
frequencies that are lower, voice recognition becomes
difficult.
Since chances of ototoxicity
becoming reversible is rather low, doctors prescribe
antioxidants prior to exposing their patients to
ototoxic medications in order to avoid damage to the
free radicals that are mostly involved in lost or
affected vestibular disturbances or hearing problems in
the ear. And it is sensible to protect them
beforehand.
However,
to end all confusions about the nature and type of
ototoxic medication, an eminent Doctor of Medicine have
listed six categories of prescription drugs that bear
the stamp of ototoxicity and had published the same in
the September 1996 issue of Tinnitus Today. For the
benefit of readers, this is reproduced here in its
original form in order to avoid any medical
misrepresentation or factual
distortion.
1
Salicylates Drugs that cause tinnitus - Aspirin and/or
aspirin related drugs.
Consumption
of 6 to 8 pills per day triggers toxicity in most
patients. However, it is always reversible after
medications are stopped.
2 List
Of Drugs That Cause Tinnitus Anti-Inflammatory Drugs
belonging to the Non-Steroidal Group
(NSAIDS)
Anaprox,
Advil, Aleve, Clinoril, Motrin, Poradol, Indocin,
Lodine, Nalfon, Naprosyn, Nuprine, Feldene and a few
more. Toxicity is starts with consumption of 6 to 8
pills par day but the effect is reversible after
medication is stopped.
3
Antibiotics Erythromycin, Aminoglycosides,
Vancomycin.
a.
Aminoglycosides Neomycin,
Streptomycin, Kanamycin, Gantamycin, Tobramysin,
Amikacin, Netilmycin. Used intravenously to overcome
life-threatening conditions, these medications prove
ototoxic. However, regular monitoring of blood level in
relation to these may prevent ototoxicity. Also,
Gentamycin and Neomycin based topical preparations or
eardrops do not have ototoxicity.
b.
Erythromycin Newer
derivatives of this drug variety comprise E-mycin, Eryc,
EES, Pediazol, Ilosone, Biaxine, Zithromax. Administered
intravenously in dosage measuring 2 to 4 grams every 24
hours, these drugs prove ototoxic. With underlying renal
insufficiency, the problem is manifold. However, oral
dose not exceeding one gram every 24 hours is not
considered ototoxic. No significant ototoxicity record
of these newer Erythromycin drug formulations (given in
low oral dose) have been reported till now.
c. Vancomycin
Vincocin. This antibiotic provides similar benefits like
the aminoglycosides. Proves potentially ototoxic when
administered intravenously to combat dangerous
life-threatening infection. Administered usually with
aminoglycosides that is likely to increases the level of
ototoxicity.
4 Loop
Diuretics Drugs that cause tinnitus Endecrin, Bumex,
Lasix
In
treating acute kidney failure or severe hypertension,
these medications administered intravenously prove
ototoxic. However, when orally administered, even in
high dosage, ototoxicity rarely comes to the surface.
So, people with chronic kidney failure are usually given
oral doses instead of through intravenous
injections.
5
Chemotherapy Agents Vincristine, Cisplatin, Nitrogen
Mustard.
These
medications prove ototoxic when used for cancer
treatment. However, the effects can be minimized through
constant checking of blood level and serial audiograms
performed at regular interval. But patients who are
already under sundry ototoxic medications like
aminoglycosides or loop diuretics, the ototoxicity level
may go beyond tolerance.
6
Quinine Anti-malarial drugs and drugs that are used to
control night cramps (Muscle relaxants. Comprises
Atabrine, Aralen, etc. and Legatrin, Q-Vel Muscle
relaxant.
With
quinine, the ototoxic effects are similar to that of
aspirin. However, it is reversible when medication is
withdrawn.
The list
also includes the symptoms of ototoxicity, as regard to
terms of frequency and is described
below.
- Tinnitus
occurrence in one or both ears.
- Appearance
of a new sound intensifies existing
tinnitus.
- Barring
infection, fullness or pressure felt in the
ears.
- Hearing
loss awareness in an unaffected ear or increment of an
existing loss.
Thus, we see that there are many drugs that can
cause tinnitus
.
Also, it is necessary to remember that most conventional
drugs fail to provide a permanent remedy. That is
because, they just aim to suppress the symptoms, without
really trying to fix the internal root causes of the
problem. Even home remedies and herbal supplements may
not give the results always. The right approach is to
first find out the real cause of the problem and then
fix it, and only then can you hope to get a remedy.