Eglonyl (sulpiride) is an antipsychotic medication, and like other medications in its class, it may cause a range of side effects. The most common side effects include:
- Dizziness
- Headache
- Drowsiness or feeling sleepy
- Insomnia
- Constipation
- Dry mouth
- Increased appetite and weight gain or loss
- Nausea or vomiting
- Nasal congestion
- Restlessness
- Impaired concentration
- Skin becoming more sensitive to sunlight
Extrapyramidal side effects may also occur, such as:
- Tremor
- Dystonia (muscle spasms or abnormal postures)
- Akathisia (sense of inner restlessness)
- Parkinsonism (symptoms similar to Parkinson’s disease)
Hormonal changes are possible, including hyperprolactinaemia (increased prolactin levels), which may lead to:
- Sexual dysfunction
- Abnormal breast milk production (galactorrhoea), even in non-pregnant individuals
- Breast discomfort and enlargement (including in men)
- Menstrual irregularities (such as amenorrhoea)
Other important but less common (<1% incidence) or potentially severe side effects include:
- Tardive dyskinesia (slow, repetitive, involuntary movements, often of the face; most commonly with long-term use and may be permanent)
- QTc interval prolongation and potentially fatal arrhythmias
- Cholestatic jaundice and elevated liver enzymes
- Primary biliary complications
- Neuroleptic malignant syndrome (fever, muscle rigidity, confusion, rapid heartbeat, sweating; seek medical attention immediately if suspected)
- Skin rash
- Severe allergic reactions, such as anaphylactic shock
- Oculogyric crisis (spastic movements of the eyes)
- Low blood pressure
If you experience muscle stiffness, high fever, confusion, rapid heartbeat, or sweating, contact your doctor immediately as these could indicate a serious reaction.
The majority of patients tolerate sulpiride well, and many side effects improve as the body adjusts. However, it’s important to discuss any persistent or troubling symptoms with your healthcare provider. This list is not exhaustive, and additional information can be found in the manufacturer’s leaflet or by consulting with a medical professional.