STRATTERA was
administered to 5382 children
or adolescent patients with ADHD and 1007 adults with ADHD in clinical
studies. During the ADHD clinical trials, 1625
children and adolescent patients were treated
for longer than 1 year and 2529
children and adolescent patients were treated
for over 6 months.
Because clinical trials are conducted under
widely varying conditions, adverse reaction rates observed in the clinical
trials of a drug cannot be directly compared to rates in the clinical trials
of another drug and may not reflect the rates observed in practice.
Child and Adolescent
Clinical Trials
Reasons for discontinuation of treatment due to adverse
reactions in child and adolescent clinical trials —
In acute child and adolescent placebo–controlled trials, 3.0% (48/1613)
of atomoxetine subjects
and 1.4% (13/945) placebo subjects
discontinued for adverse reactions. For all studies, (including open–label
and long–term studies), 6.3% of extensive metabolizer (EM)
patients and 11.2% of poor metabolizer (PM)
patients discontinued because of an adverse reaction. Among STRATTERA–treated
patients, irritability (0.3%, N=5); somnolence
(0.3%, N=5); aggression (0.2%, N=4); nausea (0.2%, N=4); vomiting (0.2%,
N=4); abdominal pain (0.2%, N=4); constipation
(0.1%, N=2); fatigue (0.1%, N=2); feeling abnormal (0.1%, N=2); and headache
(0.1%, N=2) were the reasons for discontinuation reported by more
than 1 patient.
Seizures — STRATTERA has
not been systematically evaluated in pediatric patients with seizure disorder
as these patients were excluded from clinical studies during the product’s
premarket testing. In the clinical development program, seizures were reported
in 0.2% (12/5073) of children whose average age was 10 years (range 6 to 16
years). In these clinical trials, the seizure risk among poor metabolizers
was 0.3% (1/293) compared to 0.2% (11/4741) for extensive metabolizers.
Commonly observed adverse reactions in acute child and
adolescent, placebo–controlled trials —
Commonly observed adverse reactions associated with the use of STRATTERA (incidence
of 2% or greater) and not observed at an equivalent incidence
among placebo–treated patients (STRATTERA incidence greater than placebo) are listed in Table 1.
Results were similar in the BID
and the QD trial except as shown in Table 2,
which shows both BID and QD results for selected adverse
reactions based on statistically
significant Breslow-Day tests. The most commonly observed adverse
reactions in patients treated with STRATTERA (incidence
of 5% or greater and at least twice the incidence in placebo patients, for
either BID or QD dosing) were: nausea, vomiting,
fatigue, decreased appetite, abdominal
pain, and somnolence (see Tables 1 and 2).
Table 1: Common Treatment–Emergent Adverse
Reactions Associated with the Use of STRATTERA in
Acute (up to 18 weeks) Child and Adolescent
TrialsAdverse Reaction | Percentage of Patients Reporting Reaction |
| STRATTERA (N=1597) | Placebo (N=934) |
Gastrointestinal
Disorders | | |
Abdominal pain
| 18 | 10 |
Vomiting | 11 | 6 |
Nausea | 10 | 5 |
| | |
| | |
General
Disorders and Administration Site Conditions | | |
Fatigue | 8 | 3 |
Irritability | 6 | 3 |
Therapeutic response
unexpected | 2 | 1 |
Investigations | | |
Weight decreased | 3 | 0 |
Metabolism
and Nutritional Disorders | | |
Decreased appetite | 16 | 4 |
Anorexia | 3 | 1 |
Nervous
System Disorders | | |
Headache | 19 | 15 |
Somnolence
| 11 | 4 |
| | |
Dizziness | 5 | 2 |
| | |
| | |
| | |
Skin
and Subcutaneous Tissue Disorders | | |
Rash | 2 | 1 |
Table 2: Common Treatment-Emergent Adverse Reactions
Associated with the Use of STRATTERA in
Acute (up to 18 weeks) Child and Adolescent
TrialsAdverse Reaction | Percentage of Patients Reporting Reaction from BID
Trials | Percentage of Patients Reporting Reaction from QD
Trials |
| STRATTERA (N=715) | Placebo (N=434) | STRATTERA (N=882) | Placebo (N=500) |
Gastrointestinal
Disorders | | | | |
Abdominal pain
| 17 | 13 | 18 | 7 |
Vomiting | 11 | 8 | 11 | 4 |
Nausea | 7 | 6 | 13 | 4 |
| | | | |
Constipation
| 2 | 1 | 1 | 0 |
| | | | |
General
Disorders | | | | |
Fatigue | 6 | 4 | 9 | 2 |
Psychiatric
Disorders | | | | |
Mood swings
| 2 | 0 | 1 | 1 |
The
following adverse reactions occurred in at least 2% of PM patients and were
either twice as frequent or statistically significantly more frequent in PM
patients compared with EM patients: insomnia (15% of PMs, 10% of EMs); weight
decreased (7% of PMs, 4% of EMs); constipation (7% of PMs, 4% of EMs); depression (7% of PMs, 4% of EMs); tremor (5%
of PMs, 1% of EMs); excoriation (4% of PMs, 2% of EMs); conjunctivitis 3%
of PMs, 1% of EMs); syncope (3% of PMs, 1% of EMs); early morning awakening
(2% of PMs, 1% of EMs); mydriasis (2% of PMs, 1% of EMs).
Adult Clinical
Trials
Reasons for discontinuation of treatment due to adverse
reactions in acute adult placebo–controlled trials —
In the acute adult placebo–controlled trials, 11.3% (61/541) atomoxetine subjects
and 3.0% (12/405) placebo subjects discontinued for adverse
reactions. Among STRATTERA–treated
patients, insomnia (0.9%, N=5); nausea
(0.9%, N=5); chest pain (0.6%, N=3); fatigue (0.6%, N=3);
anxiety (0.4%, N=2); erectile dysfunction (0.4%, N=2);
mood swings (0.4%, N=2); nervousness (0.4%, N=2);
palpitations (0.4%, N=2); and urinary retention (0.4%, N=2) were
the reasons for discontinuation reported by more than 1 patient.
Seizures — STRATTERA has
not been systematically evaluated in adult patients with a seizure disorder
as these patients were excluded from clinical studies during the product’s
premarket testing. In the clinical development program, seizures were reported
on 0.1% (1/748) of adult patients. In these clinical trials, no poor metabolizers
(0/43) reported seizures compared to 0.1% (1/705) for extensive metabolizers.
Commonly observed adverse reactions in acute adult placebo–controlled
trials — Commonly observed adverse reactions associated with
the use of STRATTERA (incidence
of 2% or greater) and not observed at an equivalent incidence among placebo–treated
patients (STRATTERA incidence
greater than placebo) are listed in Table 3. The most commonly
observed adverse reactions in patients treated with STRATTERA (incidence
of 5% or greater and at least twice the incidence in placebo patients) were: constipation,
dry mouth, nausea, fatigue, decreased appetite, insomnia, erectile dysfunction, urinary
hesitation and/or urinary retention and/or dysuria, dysmenorrhea, and hot flush (see Table 3).
Table 3: Common Treatment-Emergent Adverse Reactions
Associated with the Use of STRATTERA in
Acute (up to 25 weeks) Adult TrialsAdverse Reaction | Percentage of Patients Reporting Reaction |
System Organ Class/Adverse
Reaction
| STRATTERA (N=540) | Placebo (N=402) |
Cardiac
Disorders | | |
Palpitations | 3 | 1 |
Gastrointestinal
Disorders | | |
Dry mouth | 21 | 7 |
Nausea | 21 | 5 |
Constipation | 9 | 3 |
Abdominal pain
| 7 | 5 |
Dyspepsia | 4 | 2 |
| | |
Vomiting | 3 | 2 |
General
Disorders and Administration Site Conditions | | |
Fatigue | 9 | 4 |
| | |
Chills | 3 | 1 |
Therapeutic response
unexpected | 3 | 1 |
Feeling jittery | 2 | 0 |
Investigations | | |
Weight decreased | 2 | 1 |
Metabolism
and Nutritional Disorders | | |
Decreased appetite | 11 | 2 |
Nervous
System Disorders | | |
| | |
| | |
Dizziness | 6 | 4 |
Somnolence
| 4 | 3 |
Sinus headache | 3 | 1 |
Tremor | 2 | 0 |
Psychiatric
Disorders | | |
Insomnia
| 15 | 7 |
Libido decreased | 4 | 2 |
Sleep disorder | 3 | 1 |
Renal
and Urinary Disorders | | |
Urinary hesitation
and/or urinary retention | 7 | 1 |
Dysuria | 3 | 0 |
Reproductive
System and Breast Disorders | | |
Erectile dysfunction Based on total number
of males (STRATTERA, N=326; placebo, N=260). | 9 | 1 |
Dysmenorrhea Based
on total number of females (STRATTERA, N=214; placebo, N=142). | 6 | 2 |
Ejaculation delayed and/or ejaculation disorder | 3 | 1 |
| | |
| | |
Menstruation irregular | 2 | 0 |
| | |
Skin
and Subcutaneous Tissue Disorders | | |
| | |
| | |
Hyperhidrosis | 4 | 1 |
Rash | 2 | 1 |
Vascular
Disorders | | |
Hot flush | 8 | 1 |
Male and female sexual dysfunction — Atomoxetine appears
to impair sexual function in some patients. Changes in sexual desire, sexual
performance, and sexual satisfaction are not well assessed in most clinical
trials because they need special attention and because patients and physicians
may be reluctant to discuss them. Accordingly, estimates of the incidence
of untoward sexual experience and performance cited in product labeling are
likely to underestimate the actual incidence. Table 3 above displays the incidence of sexual side effects reported by at least 2% of adult patients taking STRATTERA in placebo-controlled trials.
There are no adequate and well–controlled
studies examining sexual dysfunction with STRATTERA treatment.
While it is difficult to know the precise risk of sexual dysfunction associated
with the use of STRATTERA,
physicians should routinely inquire about such possible side effects.