Which instruction is crucial for a client receiving teriparatide?

The instruction to administer teriparatide by injection is crucial because teriparatide is a recombinant form of parathyroid hormone that is specifically designed for subcutaneous injection. This route of delivery allows the medication to directly enter the bloodstream, providing effective treatment for conditions like osteoporosis by stimulating bone formation and improving bone density. It is important for clients to understand that teriparatide cannot be taken orally due to its peptide structure, which would be degraded in the gastrointestinal tract.

While other instructions may have their own significance, such as storage conditions or exercise recommendations, the mode of administration is fundamental to ensuring that the medication works as intended. Proper administration techniques are necessary for maximizing the therapeutic effects and minimizing potential complications associated with the treatment.