NR565 NP Final Study Guide: Pharmacotherapy
for Endocrine Disorders | Actual verified Study
complete Solutions
Week 5: Pharmacotherapy for Endocrine Disorders,
Chapters 48-49
Radioactive iodine adverse effects--
• short-term effects like neck tenderness, dry mouth, swollen salivary
glands, nausea, and temporary taste changes, managed with fluids,
gum, or candy.
• Long-term risks are low but can include permanent dry mouth, dental
issues, and a slightly increased risk of other cancers (like leukemia) or
fertility changes (temporary in women).
• radioactive iodine therapy, which destroys overactive thyroid cells,
effectively reducing hormone levels.
• Radioactive iodine therapy is recommended for female clients planning
to become pregnant, thyroid surgeons or more after radiation therapy,
clients with comorbidities that increase their health risks in surgery,
clients with contraindications to antithyroid medications, or clients with
a lack of access to a thyroid surgeon.
Methimazole indication and MOA
• Methimazole is specifically designed to treat hyperthyroidism by
inhibiting thyroid hormone synthesis. It is a first-line drug for treating
hyperthyroidism.
• Methimazole blocks the enzyme thyroid peroxidase, which is involved
in the synthesis of thyroid hormones T3 and T4, effectively reducing
their levels in the body. It does not impact existing thyroid hormone
stores, meaning it takes 3 to 12 weeks to have a meaningful effect on
thyroid hormone levels.
Levothyroxine education, population considerations, monitoring,
drug interactions, dosing, adjustments
• The primary function of levothyroxine is to provide synthetic thyroxine
(T4), which is converted into triiodothyronine (T3), the active form of
, thyroid hormone, within the body for clients with hypothyroidism.
• The absorption of levothyroxine is decreased by concurrent intake of
food, calcium, magnesium, and iron supplements, as well as other
medications such as antacids and proton pump inhibitors. To reduce
the risk of decreased absorption, levothyroxine should be administered
on an empty stomach and separated from these drugs by 4 hours.
, Levothyroxine can interact with [warfarin], insulin, digoxin, and
catecholamines, heightening the possibility of arrhythmias.
• Monitor TSH levels 6 to 8 weeks after starting treatment to determine if
euthyroid state has been achieved with medication therapy (TSH
should decrease to normal levels).
• Advise clients that treatment is lifelong and teach them that
levothyroxine should be taken on an empty stomach, ideally 30 to 60
minutes before breakfast, to enhance absorption.
• Levothyroxine dosage is adjusted for age and weight, decreasing as
the child grows. Start with a lower dose of levothyroxine due to the
potential for underlying cardiac conditions. The dose gradually
increased to avoid adverse cardiovascular effects. Monitoring bone
density is important because of the risk of accelerated bone loss.
Pioglitazone contraindications
• Thiazolidinediones (Pioglitazone) can cause or worsen heart failure due
to fluid retention, even in patients without prior heart disease.
• FDA placed restrictions on thiazolidinediones due to evidence linking
their use to MI and sudden cardiac death.
• Contraindicated in clients with severe heart failure and contraindicated
for clients with a history of bladder cancer.
Gemfibrozil drug interactions
• Gemfibrozil blocks statin metabolism, causing dangerously high statin
levels
• Combinations should generally be avoided: Statins (cholesterol-
lowering drugs)
o Examples: Simvastatin, Atorvastatin, Rosuvastatin, Lovastatin
▪ Risk: Severe muscle injury (myopathy, rhabdomyolysis)
Insulin detemir dosing, duration, and indications
• Insulin detemir (Levemir) is a long-acting basal insulin used to improve
glycemic control. Onset: 1-2 hours, Peak: 6-8 hours, Duration: Up to 24
hours,
o Dosing Titration:
▪ Type 1 Diabetes: 0.5-0.6 units/kg/day
▪ Type 2 Diabetes: 0.2-0.6 units/kg/day
Insulin adjustments
• Calculate the Total Daily Insulin Requirement (TDIR):
for Endocrine Disorders | Actual verified Study
complete Solutions
Week 5: Pharmacotherapy for Endocrine Disorders,
Chapters 48-49
Radioactive iodine adverse effects--
• short-term effects like neck tenderness, dry mouth, swollen salivary
glands, nausea, and temporary taste changes, managed with fluids,
gum, or candy.
• Long-term risks are low but can include permanent dry mouth, dental
issues, and a slightly increased risk of other cancers (like leukemia) or
fertility changes (temporary in women).
• radioactive iodine therapy, which destroys overactive thyroid cells,
effectively reducing hormone levels.
• Radioactive iodine therapy is recommended for female clients planning
to become pregnant, thyroid surgeons or more after radiation therapy,
clients with comorbidities that increase their health risks in surgery,
clients with contraindications to antithyroid medications, or clients with
a lack of access to a thyroid surgeon.
Methimazole indication and MOA
• Methimazole is specifically designed to treat hyperthyroidism by
inhibiting thyroid hormone synthesis. It is a first-line drug for treating
hyperthyroidism.
• Methimazole blocks the enzyme thyroid peroxidase, which is involved
in the synthesis of thyroid hormones T3 and T4, effectively reducing
their levels in the body. It does not impact existing thyroid hormone
stores, meaning it takes 3 to 12 weeks to have a meaningful effect on
thyroid hormone levels.
Levothyroxine education, population considerations, monitoring,
drug interactions, dosing, adjustments
• The primary function of levothyroxine is to provide synthetic thyroxine
(T4), which is converted into triiodothyronine (T3), the active form of
, thyroid hormone, within the body for clients with hypothyroidism.
• The absorption of levothyroxine is decreased by concurrent intake of
food, calcium, magnesium, and iron supplements, as well as other
medications such as antacids and proton pump inhibitors. To reduce
the risk of decreased absorption, levothyroxine should be administered
on an empty stomach and separated from these drugs by 4 hours.
, Levothyroxine can interact with [warfarin], insulin, digoxin, and
catecholamines, heightening the possibility of arrhythmias.
• Monitor TSH levels 6 to 8 weeks after starting treatment to determine if
euthyroid state has been achieved with medication therapy (TSH
should decrease to normal levels).
• Advise clients that treatment is lifelong and teach them that
levothyroxine should be taken on an empty stomach, ideally 30 to 60
minutes before breakfast, to enhance absorption.
• Levothyroxine dosage is adjusted for age and weight, decreasing as
the child grows. Start with a lower dose of levothyroxine due to the
potential for underlying cardiac conditions. The dose gradually
increased to avoid adverse cardiovascular effects. Monitoring bone
density is important because of the risk of accelerated bone loss.
Pioglitazone contraindications
• Thiazolidinediones (Pioglitazone) can cause or worsen heart failure due
to fluid retention, even in patients without prior heart disease.
• FDA placed restrictions on thiazolidinediones due to evidence linking
their use to MI and sudden cardiac death.
• Contraindicated in clients with severe heart failure and contraindicated
for clients with a history of bladder cancer.
Gemfibrozil drug interactions
• Gemfibrozil blocks statin metabolism, causing dangerously high statin
levels
• Combinations should generally be avoided: Statins (cholesterol-
lowering drugs)
o Examples: Simvastatin, Atorvastatin, Rosuvastatin, Lovastatin
▪ Risk: Severe muscle injury (myopathy, rhabdomyolysis)
Insulin detemir dosing, duration, and indications
• Insulin detemir (Levemir) is a long-acting basal insulin used to improve
glycemic control. Onset: 1-2 hours, Peak: 6-8 hours, Duration: Up to 24
hours,
o Dosing Titration:
▪ Type 1 Diabetes: 0.5-0.6 units/kg/day
▪ Type 2 Diabetes: 0.2-0.6 units/kg/day
Insulin adjustments
• Calculate the Total Daily Insulin Requirement (TDIR):
