Musa Yilanli, MD

Clonidine is a centrally acting alpha-2 agonist originally developed for treating hypertension. It is believed to work by stimulating alpha-2 receptors in various areas of the brain. It is nonselective, binding alpha-2A, -2B, and -2C receptors, and mediates inattentiveness, hyperactivity, impulsivity, sedation, and hypotension.¹ Clonidine is available as immediate-release (IR), extended-release, and patch formulations, with typical doses ranging from 0.1 to 0.4 mg/d. The most common adverse effects are anticholinergic, such as sedation, dry mouth, and constipation. Since clonidine is effective at lowering blood pressure, the main safety concern is the possibility of rebound hypertension if abruptly stopped, which necessitates a short taper period.¹

In child and adolescent psychiatry, the only FDA-approved use of clonidine is for treating attention-deficit/hyperactivity disorder (ADHD). Yet this medication has been increasingly used off-label for several common psychiatric ailments in pediatric patients. In this article, we discuss potential uses of clonidine in child and adolescent psychiatry; except for ADHD, all uses we describe are off-label.

ADHD. Clonidine is effective both as a monotherapy and as an adjunctive therapy to stimulants for pediatric ADHD. When used alone, clonidine is better suited for patients who have hyperactivity as their primary concern, whereas stimulants may be better suited for patients with inattentive subtypes. It also can help reduce sleep disturbances associated with the use of stimulants, especially insomnia.¹

Tics/Tourette syndrome. Clonidine is a first-line treatment for tics in Tourette syndrome, demonstrating high efficacy with limited or no adverse effects. Furthermore, ADHD is the most common comorbid condition in patients with dystonic tics, which makes clonidine useful for simultaneously treating both conditions.²

Insomnia. Currently, there are no FDA-approved medications for treating sleep disorders in children and adolescents. However, clonidine is among the most used medications for childhood sleep difficulties, second only to antihistamines. The IR formulation is often preferred for this indication due to increased sedation.³

Posttraumatic stress disorder (PTSD). Research has shown clonidine can help reduce hyperarousal symptoms, address sleep difficulties, and reduce PTSD trauma nightmares, anxiety, and irritability.⁴

Substance detoxification. Clonidine successfully suppresses opiate withdrawal signs and symptoms by reducing sympathetic overactivity. It can help with alcohol withdrawal and smoking cessation.²

Antipsychotic-induced akathisia. Controlled trials have shown that clonidine significantly reduces akathisia associated with the use of antipsychotics.²

Sialorrhea. Due to its anticholinergic effects, clonidine can effectively reduce antipsychotic-induced hypersalivation.²

Behavioral disturbances. Due to its sedative and anti-impulsive properties, clonidine can be used to address broadly defined behavioral issues, including anxiety-related behaviors, aggression, and agitation, although there is a lack of proven efficacy.^1,2,4

Clonidine is a centrally acting alpha-2 agonist originally developed for treating hypertension. It is believed to work by stimulating alpha-2 receptors in various areas of the brain. It is nonselective, binding alpha-2A, -2B, and -2C receptors, and mediates inattentiveness, hyperactivity, impulsivity, sedation, and hypotension.¹ Clonidine is available as immediate-release (IR), extended-release, and patch formulations, with typical doses ranging from 0.1 to 0.4 mg/d. The most common adverse effects are anticholinergic, such as sedation, dry mouth, and constipation. Since clonidine is effective at lowering blood pressure, the main safety concern is the possibility of rebound hypertension if abruptly stopped, which necessitates a short taper period.¹

In child and adolescent psychiatry, the only FDA-approved use of clonidine is for treating attention-deficit/hyperactivity disorder (ADHD). Yet this medication has been increasingly used off-label for several common psychiatric ailments in pediatric patients. In this article, we discuss potential uses of clonidine in child and adolescent psychiatry; except for ADHD, all uses we describe are off-label.

ADHD. Clonidine is effective both as a monotherapy and as an adjunctive therapy to stimulants for pediatric ADHD. When used alone, clonidine is better suited for patients who have hyperactivity as their primary concern, whereas stimulants may be better suited for patients with inattentive subtypes. It also can help reduce sleep disturbances associated with the use of stimulants, especially insomnia.¹

Tics/Tourette syndrome. Clonidine is a first-line treatment for tics in Tourette syndrome, demonstrating high efficacy with limited or no adverse effects. Furthermore, ADHD is the most common comorbid condition in patients with dystonic tics, which makes clonidine useful for simultaneously treating both conditions.²

Insomnia. Currently, there are no FDA-approved medications for treating sleep disorders in children and adolescents. However, clonidine is among the most used medications for childhood sleep difficulties, second only to antihistamines. The IR formulation is often preferred for this indication due to increased sedation.³

Posttraumatic stress disorder (PTSD). Research has shown clonidine can help reduce hyperarousal symptoms, address sleep difficulties, and reduce PTSD trauma nightmares, anxiety, and irritability.⁴

Substance detoxification. Clonidine successfully suppresses opiate withdrawal signs and symptoms by reducing sympathetic overactivity. It can help with alcohol withdrawal and smoking cessation.²

Antipsychotic-induced akathisia. Controlled trials have shown that clonidine significantly reduces akathisia associated with the use of antipsychotics.²

Sialorrhea. Due to its anticholinergic effects, clonidine can effectively reduce antipsychotic-induced hypersalivation.²

Behavioral disturbances. Due to its sedative and anti-impulsive properties, clonidine can be used to address broadly defined behavioral issues, including anxiety-related behaviors, aggression, and agitation, although there is a lack of proven efficacy.^1,2,4

Clonidine is a centrally acting alpha-2 agonist originally developed for treating hypertension. It is believed to work by stimulating alpha-2 receptors in various areas of the brain. It is nonselective, binding alpha-2A, -2B, and -2C receptors, and mediates inattentiveness, hyperactivity, impulsivity, sedation, and hypotension.¹ Clonidine is available as immediate-release (IR), extended-release, and patch formulations, with typical doses ranging from 0.1 to 0.4 mg/d. The most common adverse effects are anticholinergic, such as sedation, dry mouth, and constipation. Since clonidine is effective at lowering blood pressure, the main safety concern is the possibility of rebound hypertension if abruptly stopped, which necessitates a short taper period.¹

In child and adolescent psychiatry, the only FDA-approved use of clonidine is for treating attention-deficit/hyperactivity disorder (ADHD). Yet this medication has been increasingly used off-label for several common psychiatric ailments in pediatric patients. In this article, we discuss potential uses of clonidine in child and adolescent psychiatry; except for ADHD, all uses we describe are off-label.

ADHD. Clonidine is effective both as a monotherapy and as an adjunctive therapy to stimulants for pediatric ADHD. When used alone, clonidine is better suited for patients who have hyperactivity as their primary concern, whereas stimulants may be better suited for patients with inattentive subtypes. It also can help reduce sleep disturbances associated with the use of stimulants, especially insomnia.¹

Tics/Tourette syndrome. Clonidine is a first-line treatment for tics in Tourette syndrome, demonstrating high efficacy with limited or no adverse effects. Furthermore, ADHD is the most common comorbid condition in patients with dystonic tics, which makes clonidine useful for simultaneously treating both conditions.²

Insomnia. Currently, there are no FDA-approved medications for treating sleep disorders in children and adolescents. However, clonidine is among the most used medications for childhood sleep difficulties, second only to antihistamines. The IR formulation is often preferred for this indication due to increased sedation.³

Posttraumatic stress disorder (PTSD). Research has shown clonidine can help reduce hyperarousal symptoms, address sleep difficulties, and reduce PTSD trauma nightmares, anxiety, and irritability.⁴

Substance detoxification. Clonidine successfully suppresses opiate withdrawal signs and symptoms by reducing sympathetic overactivity. It can help with alcohol withdrawal and smoking cessation.²

Antipsychotic-induced akathisia. Controlled trials have shown that clonidine significantly reduces akathisia associated with the use of antipsychotics.²

Sialorrhea. Due to its anticholinergic effects, clonidine can effectively reduce antipsychotic-induced hypersalivation.²

Behavioral disturbances. Due to its sedative and anti-impulsive properties, clonidine can be used to address broadly defined behavioral issues, including anxiety-related behaviors, aggression, and agitation, although there is a lack of proven efficacy.^1,2,4

There is a well-established relationship between antipsychotic treatment and hyperprolactinemia. Most antipsychotics have been linked to increased prolactin levels, and the risk appears to be dose-related.¹ Antipsychotic-induced hyperprolactinemia can be asymptomatic, but it also has been associated with several adverse effects, including menstrual irregularity, osteoporosis, gynecomastia, and sexual dysfunction. Here I discuss what to do before starting a patient on an antipsychotic, and 5 treatment strategies for addressing antipsychotic-induced hyperprolactinemia.

Get a baseline prolactin level

Before starting a patient on an antipsychotic, obtain a baseline prolactin level measurement. If the patient later develops hyperprolactinemia, having a baseline measurement will make it easier to determine if the antipsychotic is a potential cause. Also, it is helpful to gather additional information regarding baseline psychosexual function and menstruation before starting an antipsychotic.

It is critical to determine if a temporal relationship exists between exposure to an antipsychotic and increase in prolactin levels.³ If the time course is unclear, laboratory tests need to be performed, including assessing liver, renal, and thyroid function or imaging of the pituitary gland. Also, hyperprolactinemia should not be diagnosed based on a single blood test result, because emotional and physical stress can elevate prolactin levels.

Continued to: 5 strategies for addressing hyperprolactinemia

1. Reduce the antipsychotic dose. Because the risk of hyperprolactinemia is dose-dependent, reducing the antipsychotic dose could be helpful for some patients.

2. Switch to a prolactin-sparing antipsychotic, such as clozapine, quetiapine, olanzapine, or ziprasidone. However, it is often difficult to predict positive outcomes because switching antipsychotics may cause new adverse effects or trigger a psychotic relapse.

3. Consider sex hormone replacement therapy. A combined oral contraceptive could prevent osteoporosis and help estrogen deficiency symptoms in women who require antipsychotic medication. However, this treatment approach may worsen galactorrhea.

4. Use a dopamine receptor agonist. Dopamine receptor agonists, such as cabergoline or bromocriptine, have been shown to suppress prolactin secretion. Clinicians should always proceed cautiously because these medications can potentially increase the risk of psychosis.

5. Examine the potential benefits of adding aripiprazole because it can be used for augmentation to reduce prolactin levels in patients receiving other antipsychotics. In some cases, dopamine receptors can be exposed to competition between a partial agonist (aripiprazole) and an antagonist (the current antipsychotic). This competition may decrease the effectiveness of the current antipsychotic.¹ Also, adding another antipsychotic could increase overall adverse effects.

There is a well-established relationship between antipsychotic treatment and hyperprolactinemia. Most antipsychotics have been linked to increased prolactin levels, and the risk appears to be dose-related.¹ Antipsychotic-induced hyperprolactinemia can be asymptomatic, but it also has been associated with several adverse effects, including menstrual irregularity, osteoporosis, gynecomastia, and sexual dysfunction. Here I discuss what to do before starting a patient on an antipsychotic, and 5 treatment strategies for addressing antipsychotic-induced hyperprolactinemia.

Get a baseline prolactin level

Before starting a patient on an antipsychotic, obtain a baseline prolactin level measurement. If the patient later develops hyperprolactinemia, having a baseline measurement will make it easier to determine if the antipsychotic is a potential cause. Also, it is helpful to gather additional information regarding baseline psychosexual function and menstruation before starting an antipsychotic.

It is critical to determine if a temporal relationship exists between exposure to an antipsychotic and increase in prolactin levels.³ If the time course is unclear, laboratory tests need to be performed, including assessing liver, renal, and thyroid function or imaging of the pituitary gland. Also, hyperprolactinemia should not be diagnosed based on a single blood test result, because emotional and physical stress can elevate prolactin levels.

Continued to: 5 strategies for addressing hyperprolactinemia

1. Reduce the antipsychotic dose. Because the risk of hyperprolactinemia is dose-dependent, reducing the antipsychotic dose could be helpful for some patients.

2. Switch to a prolactin-sparing antipsychotic, such as clozapine, quetiapine, olanzapine, or ziprasidone. However, it is often difficult to predict positive outcomes because switching antipsychotics may cause new adverse effects or trigger a psychotic relapse.

3. Consider sex hormone replacement therapy. A combined oral contraceptive could prevent osteoporosis and help estrogen deficiency symptoms in women who require antipsychotic medication. However, this treatment approach may worsen galactorrhea.

4. Use a dopamine receptor agonist. Dopamine receptor agonists, such as cabergoline or bromocriptine, have been shown to suppress prolactin secretion. Clinicians should always proceed cautiously because these medications can potentially increase the risk of psychosis.

5. Examine the potential benefits of adding aripiprazole because it can be used for augmentation to reduce prolactin levels in patients receiving other antipsychotics. In some cases, dopamine receptors can be exposed to competition between a partial agonist (aripiprazole) and an antagonist (the current antipsychotic). This competition may decrease the effectiveness of the current antipsychotic.¹ Also, adding another antipsychotic could increase overall adverse effects.

There is a well-established relationship between antipsychotic treatment and hyperprolactinemia. Most antipsychotics have been linked to increased prolactin levels, and the risk appears to be dose-related.¹ Antipsychotic-induced hyperprolactinemia can be asymptomatic, but it also has been associated with several adverse effects, including menstrual irregularity, osteoporosis, gynecomastia, and sexual dysfunction. Here I discuss what to do before starting a patient on an antipsychotic, and 5 treatment strategies for addressing antipsychotic-induced hyperprolactinemia.

Get a baseline prolactin level

Before starting a patient on an antipsychotic, obtain a baseline prolactin level measurement. If the patient later develops hyperprolactinemia, having a baseline measurement will make it easier to determine if the antipsychotic is a potential cause. Also, it is helpful to gather additional information regarding baseline psychosexual function and menstruation before starting an antipsychotic.

It is critical to determine if a temporal relationship exists between exposure to an antipsychotic and increase in prolactin levels.³ If the time course is unclear, laboratory tests need to be performed, including assessing liver, renal, and thyroid function or imaging of the pituitary gland. Also, hyperprolactinemia should not be diagnosed based on a single blood test result, because emotional and physical stress can elevate prolactin levels.

Continued to: 5 strategies for addressing hyperprolactinemia

1. Reduce the antipsychotic dose. Because the risk of hyperprolactinemia is dose-dependent, reducing the antipsychotic dose could be helpful for some patients.

2. Switch to a prolactin-sparing antipsychotic, such as clozapine, quetiapine, olanzapine, or ziprasidone. However, it is often difficult to predict positive outcomes because switching antipsychotics may cause new adverse effects or trigger a psychotic relapse.

3. Consider sex hormone replacement therapy. A combined oral contraceptive could prevent osteoporosis and help estrogen deficiency symptoms in women who require antipsychotic medication. However, this treatment approach may worsen galactorrhea.

4. Use a dopamine receptor agonist. Dopamine receptor agonists, such as cabergoline or bromocriptine, have been shown to suppress prolactin secretion. Clinicians should always proceed cautiously because these medications can potentially increase the risk of psychosis.

5. Examine the potential benefits of adding aripiprazole because it can be used for augmentation to reduce prolactin levels in patients receiving other antipsychotics. In some cases, dopamine receptors can be exposed to competition between a partial agonist (aripiprazole) and an antagonist (the current antipsychotic). This competition may decrease the effectiveness of the current antipsychotic.¹ Also, adding another antipsychotic could increase overall adverse effects.