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Buspirone (Buspirone Hydrochloride) - Side Effects and Adverse Reactions

 
 



ADVERSE REACTIONS

(See also.) PRECAUTIONS

Commonly Observed

The more commonly observed untoward events associated with the use of buspirone hydrochloride tablets not seen at an equivalent incidence among placebo-treated patients include dizziness, nausea, headache, nervousness, lightheadedness, and excitement.

Associated With Discontinuation of Treatment

One guide to the relative clinical importance of adverse events associated with buspirone hydrochloride tablets is provided by the frequency with which they caused drug discontinuation during clinical testing. Approximately 10% of the 2200 anxious patients who participated in the buspirone hydrochloride tablets premarketing clinical efficacy trials in anxiety disorders lasting 3 to 4 weeks discontinued treatment due to an adverse event. The more common events causing discontinuation included: central nervous system disturbances (3.4%), primarily dizziness, insomnia, nervousness, drowsiness, and lightheaded feeling; gastrointestinal disturbances (1.2%), primarily nausea; and miscellaneous disturbances (1.1%), primarily headache and fatigue. In addition, 3.4% of patients had multiple complaints, none of which could be characterized as primary.

Incidence in Controlled Clinical Trials

The table that follows enumerates adverse events that occurred at a frequency of 1% or more among buspirone hydrochloride patients who participated in 4 week, controlled trials comparing buspirone hydrochloride tablets with placebo. The frequencies were obtained from pooled data for 17 trials. The prescriber should be aware that these figures cannot be used to predict the incidence of side effects in the course of usual medical practice where patient characteristics and other factors differ from those which prevailed in the clinical trials. Similarly, the cited frequencies cannot be compared with figures obtained from other clinical investigations involving different treatments, uses, and investigators. Comparison of the cited figures, however, does provide the prescribing physician with some basis for estimating the relative contribution of drug and nondrug factors to the side-effect incidence rate in the population studied.

TREATMENT-EMERGENT ADVERSE EXPERIENCE INCIDENCE IN PLACEBO-CONTROLLED CLINICAL TRIALS* (Percent of Patients Reporting) 1
Buspirone Placebo
Adverse Experience (n = 477) (n = 464)
Cardiovascular
Tachycardia/Palpitations 1 1
CNS
Dizziness 12 3
Drowsiness 10 9
Nervousness 5 1
Insomnia 3 3
Lightheadedness 3 -
Decreased concentration 2 2
Excitement 2 -
Anger/Hostility 2 -
Confusion 2 -
Depression 2 2
EENT
Blurred vision 2 -
Gastrointestinal
Nausea 8 5
Dry mouth 3 4
Abdominal/gastric distress 2 2
Diarrhea 2 -
Constipation 1 2
Vomiting 1 2
Musculoskeletal
Musculoskeletal aches/pains 1 -
Neurological
Numbness 2 -
Paresthesia 1 -
Incoordination 1 -
Tremor 1 -
Skin
Skin rash 1 -
Miscellaneous
Headache 6 3
Fatigue 4 4
Weakness 2 -
Sweating/Clamminess 1 -

Events reported by at least 1% of buspirone patients are included. 1

Incidence less than 1%. 2

* Events reported by at least 1% of buspirone patients are included. 1

- Incidence less than 1%. 2

Other Events Observed During the Entire Premarketing Evaluation of Buspirone Hydrochloride Tablets

During its premarketing assessment, buspirone hydrochloride tablets were evaluated in over 3500 subjects. This section reports event frequencies for adverse events occurring in approximately 3000 subjects from this group who took multiple doses of buspirone hydrochloride tablets in the dose range for which buspirone is being recommended (i.e., the modal daily dose of buspirone hydrochloride tablets fell between 10 and 30 mg for 70% of the patients studied) and for whom safety data were systematically collected. The conditions and duration of exposure to buspirone hydrochloride tablets varied greatly, involving well-controlled studies as well as experience in open and uncontrolled clinical settings. As part of the total experience gained in clinical studies, various adverse events were reported. In the absence of appropriate controls in some of the studies, a causal relationship to buspirone hydrochloride treatment cannot be determined. The list includes all undesirable events reasonably associated with the use of the drug.

The following enumeration by organ system describes events in terms of their relative frequency of reporting in this data base. Events of major clinical importance are also described in the section. PRECAUTIONS

The following definitions of frequency are used: Frequent adverse events are defined as those occurring in at least 1/100 patients. Infrequent adverse events are those occurring in 1/100 to 1/1000 patients, while rare events are those occurring in less than 1/1000 patients.

Cardiovascular

Frequent was nonspecific chest pain; infrequent were syncope, hypotension, and hypertension; rare were cerebrovascular accident, congestive heart failure, myocardial infarction, cardiomyopathy, and bradycardia.

Central Nervous System

Frequent were dream disturbances; infrequent were depersonalization, dysphoria, noise intolerance, euphoria, akathisia, fearfulness, loss of interest, dissociative reaction, hallucinations, involuntary movements, slowed reaction time, suicidal ideation, and seizures; rare were feelings of claustrophobia, cold intolerance, stupor, and slurred speech and psychosis.

EENT

Frequent were tinnitus, sore throat, and nasal congestion; infrequent were redness and itching of the eyes, altered taste, altered smell, and conjunctivitis; rare were inner ear abnormality, eye pain, photophobia, and pressure on eyes.

Endocrine

Rare were galactorrhea and thyroid abnormality.

Gastrointestinal

Infrequent were flatulence, anorexia, increased appetite, salivation, irritable colon, and rectal bleeding; rare was burning of the tongue.

Genitourinary

Infrequent were urinary frequency, urinary hesitancy, menstrual irregularity and spotting, and dysuria; rare were amenorrhea, pelvic inflammatory disease, enuresis, and nocturia.

Musculoskeletal

Infrequent were muscle cramps, muscle spasms, rigid/stiff muscles, and arthralgias; rare was muscle weakness.

Respiratory

Infrequent were hyperventilation, shortness of breath, and chest congestion; rare was epistaxis.

Sexual Function

Infrequent were decreased or increased libido; rare were delayed ejaculation and impotence.

Skin

Infrequent were edema, pruritus, flushing, easy bruising, hair loss, dry skin, facial edema, and blisters; rare were acne and thinning of nails.

Clinical Laboratory

Infrequent were increases in hepatic aminotransferases (SGOT, SGPT); rare were eosinophilia, leukopenia, and thrombocytopenia.

Miscellaneous

Infrequent were weight gain, fever, roaring sensation in the head, weight loss, and malaise; rare were alcohol abuse, bleeding disturbance, loss of voice, and hiccoughs.

Postmarketing Experience

Postmarketing experience has shown an adverse experience profile similar to that given above. Voluntary reports since introduction have included rare occurrences of allergic reactions (including urticaria), angioedema, cogwheel rigidity, dizziness (rarely reported as vertigo), dystonic reactions (including dystonia), ataxias, extrapyramidal symptoms, dyskinesias (acute and tardive), ecchymosis, emotional lability, serotonin syndrome, transient difficulty with recall, urinary retention, visual changes (including tunnel vision), parkinsonism, akathisia, restless leg syndrome, and restlessness. Because of the uncontrolled nature of these spontaneous reports, a causal relationship to buspirone hydrochloride tablets treatment has not been determined.



REPORTS OF SUSPECTED BUSPIRONE SIDE EFFECTS / ADVERSE REACTIONS

Below is a sample of reports where side effects / adverse reactions may be related to Buspirone. The information is not vetted and should not be considered as verified clinical evidence.

Possible Buspirone side effects / adverse reactions in 29 year old female

Reported by a physician from United States on 2011-12-22

Patient: 29 year old female

Reactions: Death

Adverse event resulted in: death

Suspect drug(s):
Cocaine
    Administration route: Oral

Venlafaxine HCL
    Administration route: Oral

Gabapentin
    Administration route: Oral

Buspirone
    Administration route: Oral

Heroin
    Administration route: Oral



Possible Buspirone side effects / adverse reactions in 59 year old female

Reported by a physician from United States on 2011-12-29

Patient: 59 year old female

Reactions: Completed Suicide, Toxicity TO Various Agents, Intentional Drug Misuse

Adverse event resulted in: death

Suspect drug(s):
Enalapril
    Dosage: unk
    Administration route: Oral

Alprazolam
    Dosage: unk
    Administration route: Oral

Carbamazepine
    Dosage: unk
    Administration route: Oral

Omeprazole
    Dosage: unk
    Administration route: Oral

Acetaminophen and Hydrocodone Bitartrate
    Dosage: unk
    Administration route: Oral

Atenolol
    Dosage: unk
    Administration route: Oral

Prednisone
    Dosage: unk
    Administration route: Oral

Buspirone
    Dosage: unk
    Administration route: Oral

Hydroxychloroquine
    Dosage: unk
    Administration route: Oral



Possible Buspirone side effects / adverse reactions in 58 year old male

Reported by a physician from United States on 2012-01-04

Patient: 58 year old male

Reactions: Death, Completed Suicide

Adverse event resulted in: death

Suspect drug(s):
Bisoprolol Fumarate and Hydrochlorothiazide
    Dosage: unk, unknown
    Administration route: Oral
    Indication: Product Used FOR Unknown Indication

Bupropion HCL
    Dosage: unk, unknown
    Administration route: Oral
    Indication: Product Used FOR Unknown Indication

Buspirone
    Dosage: unk, unknown
    Administration route: Oral
    Indication: Product Used FOR Unknown Indication

Aripiprazole
    Dosage: unk, unknown
    Administration route: Oral
    Indication: Product Used FOR Unknown Indication

Citalopram Hydrobromide
    Dosage: unk, unknown
    Administration route: Oral
    Indication: Product Used FOR Unknown Indication

Diazepam
    Dosage: unk, unknown
    Administration route: Oral
    Indication: Product Used FOR Unknown Indication



See index of all Buspirone side effect reports >>

Drug label data at the top of this Page last updated: 2013-08-14

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