PRECAUTIONS
General
Tev-Tropin therapy should be carried out under the
regular guidance of a physician who is experienced in the diagnosis and
management of pediatric patients with growth hormone deficiency.
In childhood cancer survivors who were treated with
radiation to the brain/head for their first neoplasm and who developed
subsequent GHD and were treated with somatropin, an increased risk of a second
neoplasm has been reported. Intracranial tumors, in particular meningiomas,
were the most common of these second neoplasms. In adults, it is unknown
whether there is any relationship between somatropin replacement therapy and
CNS tumor recurrence [see CONTRAINDICATIONS]. Monitor all patients with
a history of GHD secondary to an intracranial neoplasm routinely while on
somatropin therapy for progression or recurrence of the tumor.
Because children with certain rare genetic causes of
short stature have an increased risk of developing malignancies, practitioners
should thoroughly consider the risks and benefits of starting somatropin in
these patients. If treatment with somatropin is initiated, these patients
should be carefully monitored for development of neoplams.
Monitor patients on somatropin therapy carefully for
increased growth, or potential malignant changes, of preexisting nevi.
Treatment with somatropin may decrease insulin
sensitivity, particularly at higher doses in susceptible patients. As a result,
previously undiagnosed impaired glucose tolerance and overt diabetes mellitus
may be unmasked during somatropin treatment. New-onset type 2 diabetes mellitus
has been reported in patients. Therefore, glucose levels should be monitored
periodically in all patients treated with somatropin, especially in those with
risk factors for diabetes mellitus, such as obesity, Turner syndrome, or a
family history of diabetes mellitus. Patients with preexisting type 1 or type 2
diabetes mellitus or impaired glucose tolerance should be monitored closely
during somatropin therapy. The doses of antihyperglycemic drugs (i.e., insulin
or oral agents) may require adjustment when somatropin therapy is instituted in
these patients.
In patients with hypopituitarism (multiple hormone
deficiencies), standard hormonal replacement therapy should be monitored
closely when somatropin therapy is administered. Undiagnosed/untreated
hypothyroidism may prevent an optimal response to somatropin, in particular,
the growth response in children. Patients with Turner syndrome have an
inherently increased risk of developing autoimmune thyroid disease and primary
hypothyroidism. In patients with growth hormone deficiency, central (secondary)
hypothyroidism may first become evident or worsen during somatropin treatment.
Therefore, patients treated with somatropin should have periodic thyroid
function tests and thyroid hormone replacement therapy should be initiated or appropriately
adjusted when indicated.
Patients with endocrine disorders, including growth
hormone deficiency, may have an increased incidence of slipped capital femoral
epiphysis. Any child who develops a limp or complains of hip or knee pain
during somatropin therapy should be evaluated.
Intracranial hypertension (IH) with papilledema, visual
changes, headache, nausea and/or vomiting has been reported in a small number
of patients treated with growth hormone products. IH has been reported more
frequently after treatment with IGF-1. Symptoms usually occur within the first
eight weeks after the initiation of growth hormone therapy. In all reported
cases, IH-associated signs and symptoms resolved rapidly after temporary
suspension or termination of therapy. Funduscopic examination should be
performed routinely before initiating treatment with somatropin to exclude
preexisting papilledema and periodically during the course of somatropin
therapy. If papilledema is observed by funduscopy during somatropin treatment,
treatment should be stopped. If somatropin induced idiopathic IH is diagnosed,
treatment with somatropin can be restarted at a lower dose after IH-associated
signs and symptoms have resolved.
Progression of scoliosis can occur in children who
experience rapid growth. Because somatropin increases growth rate, patients
with a history of scoliosis who are treated with somatropin should be monitored
for progression of scoliosis.
Bone age should be monitored periodically during somatropin
administration, especially in patients who are pubertal and/or receiving
concomitant thyroid hormone replacement therapy. Under these circumstances,
epiphyseal maturation may progress rapidly.
When somatropin is administered subcutaneously at the same
site over a long period of time, tissue atrophy may result. This can be avoided
by rotating the injection site. As is the case with any protein, local or
systemic allergic reactions may occur. Parents/Patient should be informed that
such reactions are possible and that prompt medical attention should be sought
if allergic reactions occur.
Information For Patients
Patients being treated with Tev-Tropin and/or their
caregivers should be informed about the potential benefits and risks associated
with treatment. See the PATIENT INFORMATION included with the product and/or
injection device. This information is intended to aid in the safe and effective
administration of the medication. It is not a disclosure of all possible adverse
or intended effects.
Patients and caregivers who will administer Tev-Tropin
should receive appropriate training and instruction on the proper use of
Tev-Tropin from the physician or other suitable qualified health care
professional. A puncture-resistant container for the disposal of used needles
and syringes should be strongly recommended. Patients and/or caregivers should
be thoroughly instructed in the importance of proper disposal, and cautioned
against any reuse of needles and syringes.
Laboratory Tests
Serum levels of inorganic phosphorus, alkaline
phosphatase, and IGF-1 may increase after somatropin therapy.
Carcinogenesis, Mutagenesis, Impairment Of Fertility
Carcinogenesis, mutagenesis and reproduction studies have
not been conducted with Tev-Tropin.
Pregnancy
Pregnancy Category C
Animal reproduction studies have not been conducted with
Tev-Tropin. It is also not known whether Tev-Tropin can cause fetal harm when
administered to a pregnant woman or can affect reproductive capacity.
Tev-Tropin should be given to a pregnant woman only if clearly needed.
Nursing Mothers
It is not known whether this drug is excreted in human
milk. Because many drugs are excreted in human milk, caution should be
exercised when Tev-Tropin is administered to a nursing woman.
Geriatric Use
The safety and effectiveness of somatropin in patients
aged 65 and over has not been evaluated in clinical studies. Elderly patients
may be more sensitive to the action of somatropin, and may be more prone to
develop adverse reactions.