Forteo Special Precautions

In normocalcemic patients, slight and transient elevations of serum calcium concentrations have been observed following teriparatide injection. Serum calcium concentrations reach a maximum between 4 and 6 hours and return to baseline by 16 to 24 hours after each dose of teriparatide.
Therefore if any blood samples are taken from a patient, this should be done at least 16 hours after the most recent FORTEO injection.
FORTEO may cause small increases in urinary calcium excretion, but the incidence of hypercalciuria did not differ from that in the placebo-treated patients in clinical trials.
FORTEO has not been studied in patients with active urolithiasis. FORTEO should be used with caution in patients with active or recent urolithiasis because of the potential to exacerbate this condition.
In short-term clinical studies with FORTEO, isolated episodes of transient orthostatic hypotension were observed. Typically, an event began within 4 hours of dosing and spontaneously resolved within a few minutes to a few hours. When transient orthostatic hypotension occurred, it happened within the first several doses, was relieved by placing subjects in a reclining position, and did not preclude continued treatment.
Caution should be exercised in patients with moderate renal impairment.
Experience in the younger adult population, including premenopausal women, is limited (see Pharmacology: Pharmacodynamics under Actions). Treatment should only be initiated if the benefit clearly outweighs risks in this population. Women of childbearing potential should use effective methods of contraception during use of FORTEO. If pregnancy occurs, FORTEO should be discontinued.
Studies in rats indicate an increased incidence of osteosarcoma with long-term administration of teriparatide (see Pharmacology: Toxicology: Preclinical safety data under Actions). Until further clinical data become available, the recommended treatment time of 24 month should not be exceeded.
Effects on ability to drive and use machines: No studies on the effects on the ability to drive and use machines have been performed. However, transient, orthostatic hypotension or dizziness was observed in some patients. These patients should refrain from driving or the use of machines until symptoms have subsided.