PTH and Hypercalcemia: The following side effects were more frequent in the teriparatide group, independent of the dose, than in the placebo group: headache (RR 1.4; CI 1.03 to 1.91), nausea (RR 2.34; CI 1.38 to 3.25), cramps (RR 3.22; CI 1.19 to 8.72), hypercalcemia (RR 9.73; CI 5.35 to 17.67) and formation of anti-PTH antibodies (RR 17.42; CI 12.39 to 126.81).