Listed side effects of Haloperidol:
Very common: More than 1 in 10 people who take Haloperidol
abnormal muscle movements or problems controlling muscle movement
difficulty sleeping extrapyramidal side effects - seek medical advice if you develop side-effects such as tremors; increased salivation; slowing of physical movements; feeling restless and an inability to sit still; difficulty moving; muscle stiffness or muscle spasms including muscle spasm of the throat
feeling agitated
headaches
Common: More than 1 in 100 people who take Haloperidol
a drop in blood pressure on standing or sitting up
abnormal laboratory test results
changes to weight
constipation
depression
diminished facial expressivity
dry mouth
erectile dysfunction
eye or eyesight problems
feeling dizzy
increased muscle tone
lowered blood pressure
nausea
oculogyric crisis
psychosis or psychotic-like behaviour
skin rash or rashes
sleepiness
tardive dyskinesia - seek immediate medical advice if you develop abnormal movements of the tongue, face, mouth or jaw
urinary retention
vomiting
Uncommon: More than 1 in 1000 people who take Haloperidol
abnormal gait
amenorrhoea
blood and bone marrow problems
blurred vision
breast pain or discomfort
breathing difficulties
confusion
convulsions
decreased or loss of libido
faster heart rate
galactorrhoea
hypersensitivity reactions
increased body temperature
increased sweating
itching
jaundice
liver problems
muscle problems
oedema
painful menstrual periods
Parkinson's-like symptoms
photosensitivity skin reaction
sedation
torticollis
urticaria
Rare: More than 1 in 10,000 people who take Haloperidol
bronchospasm
ECG changes
endocrine problems
heavy or long menstrual periods
involuntary eye movement
menstrual problems
motor problems
muscle twitching
neuroleptic malignant syndrome - seek immediate medical advice if you develop: very high temperature, stiff muscles, autonomic dysfunction, faster heart rate or changes in awareness
sexual dysfunction
spasms of the jaw muscles
The frequency of these side-effects is unknown
anaphylactic reactions
biliary problems
breast enlargement in men
cardiac arrest - this may be fatal
certain types of dermatitis
death
decreased blood sugar levels
facialoedema
heart problems - some of these heart problems may be fatal
hypothermia
increased pressure in the eye
laryngeal oedema
laryngeal spasm
metabolic problems
pneumonia - this may be fatal
priapism
reduced alertness
seizures
Stevens-Johnson syndrome
thromboembolism such as deep vein thrombosis or pulmonary embolism
toxic epidermal necrolysis
vasculitis
withdrawal symptoms can occur when this medicine is stopped abruptly. These include nausea, vomiting or difficulty sleeping
http://www.nhs.uk/Conditions/Schizophrenia/Pages/MedicineSideEffects.aspx?condition=Schizophrenia%20and%20Psychosis&medicine=haloperidol