Absenor
Absenor is a medication used to treat epilepsy and mania (a mood disorder).
Form
depottabletti
Strength
300 mg
Active Ingredient
Sodium valproate
Manufacturer
Orion Corporation
How to Use
Dosage
Your doctor will set your daily dose, which is typically between 1000 mg and 2000 mg.
Method
Swallow the prolonged-release tablets whole with water. Do not chew or crush them.
Important
Your doctor will determine your maximum daily dose; never take more than prescribed.
Possible Side Effects
COMMON
- •Nausea, vomiting, stomach ache, or diarrhea, especially when you start treatment.
- •Shaking (tremors).
- •Feeling very tired or sleepy.
- •Headaches.
- •Low number of red blood cells (anemia) or blood platelets.
- •Changes in your weight.
- •Feeling confused or having trouble concentrating.
- •Temporary hair loss.
- •Menstrual pain.
- •Leaking urine (involuntary urination).
- •Problems with movement, such as stiff muscles or unsteady walking.
- •Easy bruising or bleeding without clear cause.
- •Uncontrolled eye movements.
- •Hearing loss.
- •Gum problems or mouth sores.
- •Allergic reactions or nail changes.
RARE
- •Very low numbers of all types of blood cells.
- •Hormonal imbalances, such as increased male hormones in women causing acne or hair loss.
- •Temporary Parkinson-like symptoms, seizures getting worse, or tingling or numbness in hands/feet.
- •Inflammation of small blood vessels (vasculitis).
- •Skin rashes, unusual hair growth, or changes in hair color or texture.
- •Weakening of bones (osteoporosis), bone loss, or fractures.
- •Irregular or absent menstrual periods.
- •Low body temperature or swelling in your hands and feet (edema).
- •Problems with blood cell development in bone marrow.
- •Underactive thyroid.
- •High ammonia levels in blood, leading to balance problems, severe drowsiness, or vomiting.
- •Unusual behavior, hyperactivity, learning difficulties, or sleep problems.
- •Difficulty speaking or coordination problems.
- •A rare disease affecting skin and other organs (Systemic Lupus Erythematosus).
- •Severe muscle pain and breakdown (rhabdomyolysis).
- •Bedwetting.
- •Polycystic ovaries (cysts on ovaries in women).
- •Male infertility (often temporary after stopping or reducing dose).
- •Problems with blood clotting.
- •Lack of vitamin B8 (biotin deficiency).
- •Psychosis, anxiety, or depression.
- •A blood disorder where white blood cells have an unusual shape (Pelger-Huët anomaly).
Important Warnings
- Absenor can seriously harm an unborn baby if taken during pregnancy. If you can become pregnant, use effective birth control throughout treatment. Contact your doctor immediately if you plan to get pregnant or think you might be. Do not stop taking Absenor without your doctor's advice.
- Contact your doctor immediately if you experience severe nausea, vomiting, stomach pain, extreme tiredness, or yellow skin/eyes, as these could be signs of serious liver or pancreas problems.
- Seek immediate medical attention if you notice any signs of severe skin reactions, such as blistering, peeling skin, rashes, or flu-like symptoms, as these can be life-threatening.
- Tell your doctor if you experience confusion, severe tiredness, or balance problems, especially with vomiting, as this might be due to high ammonia levels in your blood.
- Contact your doctor right away if you have thoughts of harming yourself or suicide.
Show 1 more warnings
- Inform your doctor if your seizures get worse or become more frequent.
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)