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Pharmacology · chapter 36 · Reproductive Health Drugs

Bisphosphonates, Calcium Preparations, Vitamin D, and Estrogen Receptor Modulators

The 14 things this section of the textbook says that you are most likely to be asked about — quoted word for word, not retold. Then 6 practice questions with the reasoning.

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Key points

  1. Exercise and bone density testing

    Weight-bearing exercises, such as walking for 30 minutes several days a week, should be included as part of client education. Routine bone density testing should be scheduled to determine the effectiveness of the drug therapy (Ganesan et al., 2022).
  2. Bisphosphonate adverse effects

    Adverse Effects and Contraindications Adverse effects of bisphosphonates include decreased serum calcium and serum phosphate levels, arthralgia, myalgia, stomach pain, difficulty swallowing, heartburn, and irritation or pain of the esophagus.
  3. Osteonecrosis of the jaw

    One major adverse effect from bisphosphonate therapy is osteonecrosis of the jaw (Madhumati Gonegandla, 2020).
  4. No invasive dental work

    This complication occurs more often in clients with cancer and in those who have invasive dental procedures. Thus, invasive dental procedures should not be performed while a client is receiving bisphosphonates.
  5. Must stay upright 30 minutes

    Additionally, bisphosphonates should not be used if the client is unable to sit up or stand for at least 30 minutes after taking the medication, to reduce the risk of esophageal irritation. Severe renal insufficiency is another instance where bisphosphonates should not be used.
  6. Vitamin D and estrogen protect bone

    Vitamin D is essential for calcium absorption and for maintaining adequate calcium levels. Estrogen is also important for maintaining bone health; thus, during menopause when females produce less estrogen, they have a considerable risk of developing osteopenia and osteoporosis (National Institutes of Health, 2022).
  7. Fat reduces calcium absorption

    The greater the fat content, the less calcium is absorbed.
  8. IV calcium for emergencies

    Calcium gluconate and calcium chloride are administered intravenously and used for serious and life-threatening acute hypocalcemia, hyperkalemia, and certain cardiac emergencies.
  9. Signs of hypercalcemia

    Hypercalcemia can lead to poor muscle tone, renal insufficiency, weight loss, fatigue, polyuria, and heart arrhythmias.
  10. Separating calcium and levothyroxine

    Levothyroxine is one example; it should be taken at least 30 minutes prior to or 2 hours after calcium.
  11. Raloxifene and clot risk

    Caution should be used for clients with a history of deep vein thrombosis and/or smoking because of the risk of clot development.
  12. Raloxifene boxed warning

    Raloxifene may cause increased risk of venous thromboembolism and death from stroke in clients with a history of venous thrombosis, documented coronary heart disease, or at increased risk for major coronary events.
  13. Toremifene boxed warning

    Toremifene may cause QT prolongation, which could result in a type of ventricular tachycardia called torsade de pointes, which may result in syncope, seizure, and/or death.
  14. How to take a bisphosphonate

    Know the medication dosage and route and be able to self-administer correctly (e.g., drink at least 6–8 ounces of water with bisphosphonate and remain standing or sitting upright for 30 minutes after taking the medication).

Terms to know

Osteopenia
Osteopenia is a condition in which bone mass is decreased, causing bones to become weaker.
Osteoporosis
Osteoporosis is a condition in which bone mass has decreased to the point that bones become brittle and are much more likely to fracture (Fink, 2019; Zareef Jackson, 2021; National Institutes of Health, 2022).
Bisphosphonates
See Thyroid and Parathyroid Disorder Drugs for more information regarding bisphosphonates, calcium preparations, and vitamin D.) Bisphosphonates Bisphosphonates are a category of drugs used to prevent and treat osteoporosis in postmenopausal clients.
Estrogen receptor modulators
Estrogen Receptor Modulators Estrogen receptor modulators (ERMs) are not hormones.

Practice questions

Stuck on select-all-that-apply? How to take them one option at a time.

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Every question here, with the answer

  1. A client is starting weekly alendronate. Which instruction is correct?

    1. Take it together with your calcium supplement.
    2. Take it with 6–8 ounces of water and stay upright for 30 minutes.
    3. Take it at bedtime and lie down right away.
    4. Take it with breakfast and a glass of orange juice.

    Answer: Take it with 6–8 ounces of water and stay upright for 30 minutes.

    Bisphosphonates are taken with at least 6–8 ounces of water, and the client stays standing or sitting upright for 30 minutes to reduce esophageal irritation. They should not be taken with other medications or supplements, and orange juice is avoided for 2 hours.

  2. A client who takes alendronate says she is scheduled for a tooth extraction next week. What should the nurse do?

    1. Notify the health care provider, because invasive dental procedures should not be done during bisphosphonate therapy.
    2. Tell her the extraction is safe with this drug.
    3. Advise her to take calcium right after the extraction.
    4. Tell her to double her dose before the procedure.

    Answer: Notify the health care provider, because invasive dental procedures should not be done during bisphosphonate therapy.

    Osteonecrosis of the jaw is a major adverse effect and occurs more often with invasive dental procedures, which should not be done while receiving bisphosphonates. The other responses ignore this risk.

  3. In which clients should the nurse question an order for an oral bisphosphonate? Select all that apply.

    1. A client with severe renal insufficiency
    2. A client who walks 30 minutes most days
    3. A postmenopausal client with osteoporosis
    4. A client with an esophageal abnormality that delays stomach emptying
    5. A client who cannot sit up for 30 minutes after a dose

    Answer: A client with severe renal insufficiency, A client with an esophageal abnormality that delays stomach emptying, A client who cannot sit up for 30 minutes after a dose

    Bisphosphonates are contraindicated with esophageal abnormalities that delay emptying, inability to stay upright for 30 minutes, and severe renal insufficiency. Postmenopausal osteoporosis is the indication, and walking is recommended.

  4. A client takes levothyroxine every morning and has started a calcium supplement. What should the nurse teach?

    1. Take both at the same time to make it easier.
    2. Take calcium with a high-fat meal.
    3. Stop levothyroxine while taking calcium.
    4. Take levothyroxine at least 30 minutes before or 2 hours after the calcium.

    Answer: Take levothyroxine at least 30 minutes before or 2 hours after the calcium.

    Calcium can reduce absorption of other drugs, so levothyroxine is taken at least 30 minutes before or 2 hours after calcium. A high-fat meal reduces calcium absorption, and stopping levothyroxine is not advised.

  5. A client is prescribed raloxifene for osteoporosis. Which findings in her history are reasons for concern? Select all that apply.

    1. History of pulmonary embolism
    2. History of deep vein thrombosis
    3. Documented coronary heart disease
    4. Current smoking
    5. Previous low calcium intake

    Answer: History of pulmonary embolism, History of deep vein thrombosis, Documented coronary heart disease, Current smoking

    Raloxifene carries a risk of clots and a boxed warning for venous thromboembolism and stroke death in clients with prior thrombosis or coronary heart disease; smoking also raises clot risk. Low calcium intake is managed by adding supplements.

  6. A client taking calcium supplements reports fatigue, weakness, and urinating much more than usual. What should the nurse suspect?

    1. Osteonecrosis of the jaw
    2. Hypocalcemia
    3. Hypercalcemia
    4. Vitamin D deficiency

    Answer: Hypercalcemia

    Hypercalcemia can lead to poor muscle tone, renal insufficiency, weight loss, fatigue, polyuria and arrhythmias. The other conditions do not match this pattern in the section.

Where every quote comes from

Section 36.4 Bisphosphonates, Calcium Preparations, Vitamin D, and Estrogen Receptor Modulators of Pharmacology for Nurses by Tina Barbour-Taylor, Leah Mueller (Sabato), Donna Paris, Dorie Weaver, OpenStax, 2024. Read the whole section free at openstax.org.

The textbook is licensed under CC BY-NC-SA 4.0. This page quotes it word for word and adds the headings, the order and the practice questions; references to the book's figures and stray spaces left by its formatting are removed. The page is shared under the same licence. Nothing here is sold.