Absenor
Absenor is a medicine used to treat epilepsy and a mood condition called mania.
Form
enterotabletti
Strength
100 mg
Active Ingredient
Sodium valproate
Manufacturer
Orion Corporation
How to Use
Dosage
Your doctor will tell you how much to take. The usual daily dose is between 1000 mg and 2000 mg.
Method
Swallow the tablets whole with water, with or without food.
Important
Do not take more than 2000 mg daily, unless your doctor tells you to.
Possible Side Effects
COMMON
- •Tremor (shaking)
- •Anemia (low red blood cells), low platelets (cells that help blood clot)
- •Changes in blood levels like low sodium, high insulin, low good cholesterol (HDL), and weight changes (gain or loss)
- •Feeling confused, seeing or hearing things that aren't there (hallucinations), acting aggressively or restless, having trouble focusing, or losing your appetite
- •Feeling drowsy or very sleepy, having memory problems, headaches, eyes moving without you meaning them to (nystagmus), or feeling dizzy
- •Deafness (hearing loss)
- •Throwing up, pain in the upper stomach, or diarrhea, especially when you first start taking the medicine
- •Gum problems or mouth sores
- •Allergic reactions, temporary hair loss, or problems with your nails
- •Menstrual pain
RARE
- •Low numbers of different blood cells (like white blood cells)
- •Hormonal changes, such as too many male hormones in women (leading to more body hair, male-like features, acne) or irregular/missing periods
- •Temporary symptoms like Parkinson's disease (shaking, stiffness), problems with balance or coordination, or tingling/numbness in hands or feet
- •Inflammation of small blood vessels (vasculitis)
- •Skin reactions like unusual rashes, unusual hair growth, or changes in hair color or texture
- •Weakening of bones, bone loss, or fractures
- •Low body temperature, or swollen feet and ankles
- •Underactive thyroid (gland in your neck)
- •High ammonia in your blood or obesity (being very overweight)
- •Abnormal behavior, being very restless (psychomotor hyperactivity), learning difficulties, or trouble sleeping
- •Speech problems or problems with coordination
- •A disease called Systemic Lupus Erythematosus (SLE)
- •Muscle pain and weakness (rhabdomyolysis, sudden muscle damage)
- •Bedwetting
- •Polycystic ovaries (cysts on your ovaries)
- •Infertility in men (usually gets better after stopping or lowering the dose)
- •Blood clotting problems
- •Low levels of vitamin B8 (biotin)
- •Mental health issues like psychosis, anxiety, or depression
- •A blood problem where some white blood cells have an unusual shape (acquired Pelger-Huët anomaly)
Important Warnings
- Absenor can seriously harm an unborn baby. If you are a woman who can get pregnant, use reliable birth control during all of your Absenor treatment. Do not stop taking Absenor without your doctor's advice.
- Tell your doctor right away if you have repeated vomiting, feel very tired, have stomach pain, feel sleepy or weak, lose your appetite, have yellow skin or eyes, or swollen legs. These can be signs of serious problems with your liver or pancreas.
- Contact your doctor if you or your child have trouble with balance or coordination, feel very sleepy or less alert, and are throwing up. These could mean high ammonia in the blood.
- Tell your doctor if you gain weight or have irregular periods, as these could be signs of polycystic ovary syndrome.
- If you ever think about harming yourself or ending your life, tell your doctor right away.
Show 2 more warnings
- Let your doctor know if your seizures get worse or happen more often.
- Get medical help right away if you see signs of bad skin reactions, like blisters, peeling skin, rashes, flu-like symptoms, or swollen glands.
Use in Elderly Patients
Category C
Suitable for older adults, with specific precautions. Low serum albumin levels increase the response. Consider potential adverse effects, such as hyponatraemia och hematological changes. Monitor liver function. (updated 10.11.2025)