Based on the experience of clinical use of pregabalin in more than 12000 patients, the most common adverse events were drowsiness and dizziness. By severity, adverse events were mostly mild and moderate. The frequency of discontinuation due to adverse events was 14% in the pregabalin group and 5% in the placebo group. The main side effects that required cessation of treatment with pregabalin were dizziness and drowsiness.
The frequency of adverse reactions was determined according to the following gradation (classification of the World Health Organization): very often more than 1/10, often from more than 1/100 to less than 1/10, infrequently from more than 1/1000 to less than 1/100, from more than 1/10000 to less than 1/1000, very rarely - from less than 1/10000, including individual messages.
The listed undesirable phenomena could be associated with the underlying disease and / or concomitant therapy.
Infectious and parasitic diseases:
Often: nasopharyngitis.
Violations from the blood and lymphatic system:
Infrequent: neutropenia.
Disorders from the metabolism and nutrition:
Often: increased appetite.
Infrequently: anorexia, hypoglycaemia.
Disorders of the psyche:
Often: confusion, disorientation, irritability, euphoria, decreased libido, insomnia.
Infrequently: depersonalization, anorgasmia, anxiety, depression, agitation, mood changes, depressed mood, difficulty in finding words, hallucinations, unusual dreams, increased libido, panic attacks, apathy.
Rarely: disinhibition.
Impaired nervous system:
Very often: dizziness, drowsiness, headache.
Often: ataxia, impaired coordination of movements, balance disorder, amnesia, attention impairment, memory impairment, tremor, dysarthria, paresthesia, sedation, lethargy.
Infrequently: cognitive disorders, hypoesthesia, nystagmus, speech disorders, myoclonic cramps, weakened reflexes, dyskinesia,psychomotor agitation, postural dizziness, hyperesthesia, loss of taste, burning sensation on the mucous membranes and skin, intentional tremor, stupor, loss of consciousness, mental disorders, malaise.
Rarely: convulsions, hypokinesia, parosmia, dysgraphia.
Disorders from the side of the organ of vision:
Often: blurred vision, diplopia.
Infrequent: blurred vision, loss of peripheral vision, visual field defects, dry eyes, eye swelling, decreased visual acuity, eye pain, asthenopia, lacrimation, eye irritation, photopsy.
Rarely: mydriasis, loss of vision, keratitis, oscilloscopy (subjective sensation of fluctuations in the subjects under consideration), changes in visual perception of depth, strabismus, increased brightness of visual perception.
Hearing disorders and labyrinthine disturbances:
Often: vertigo.
Infrequently: hyperacusis.
Heart Disease:
Infrequent: atrioventricular block of the I degree, tachycardia, sinus bradycardia, congestive heart failure.
Rarely: interval lengthening QT, sinus tachycardia, sinus arrhythmia.
Vascular disorders:
Infrequent: lowering blood pressure (BP), increasing blood pressure, skin hyperemia, a feeling of heat, cold extremities.
Disturbances from the respiratory system, chest and mediastinal organs:
Infrequent: shortness of breath, dry nasal mucosa, cough, nasal congestion, epistaxis, rhinitis, snoring.
Rarely: pulmonary edema, a feeling of "restraint" in the throat.
Disorders from the gastrointestinal tract:
Often: vomiting, nausea, constipation, dry mouth, flatulence, bloating.
Infrequently: hypersalivation, gastroesophageal reflux, oral cavity hypoesthesia.
Rarely: dysphagia, pancreatitis, ascites, edema of the tongue.
Disturbances from the skin and subcutaneous tissues:
Infrequently: sweating, papular rashes, hives, itching of the skin.
Rarely: cold sweat, Stevens-Johnson syndrome.
Disturbances from the musculoskeletal and connective tissue:
Often: muscle twitching, muscle cramps, arthralgia, back pain, pain in the extremities, spasm of the neck muscles.
Infrequently: myalgia, swelling of the joints, neck pain, rigidity of the muscles.
Rarely: rhabdomyolysis.
Disorders from the kidneys and urinary tract:
Uncommon: dysuria, urinary incontinence.
Rarely: oliguria, renal failure, urinary retention.
Violations of the genitals and breast:
Often: erectile dysfunction.
Infrequent: delay in ejaculation, sexual dysfunction, dysmenorrhea, pain in the mammary gland.
Rare: amenorrhea, discharge from the breast, dysmenorrhea, breast enlargement, gynecomastia.
General disorders and disorders at the site of administration:
Common: peripheral edema, edema, gait disturbance, feeling "drunk", fatigue, falls, abnormal sensations.
Uncommon: chest tightness, swelling of the face, pain, chills, thirst, generalized edema, pyrexia, asthenia.
Impact on laboratory and instrumental research results:
Often: weight gain.
Infrequently: increased activity of alanine aminotransferase, creatine kinase, aspartate aminotransferase, decreased platelet count, increased glucose concentration in the blood plasma, increased creatinine concentration in blood plasma, reduction of potassium concentration in blood plasma, reduction of body weight.
Rarely: a decrease in the number of leukocytes in the blood.