Histec
Histec is an allergy medicine used to treat symptoms of allergic rhinitis and chronic hives in adults and children over 6 years old.
Form
imeskelytabletti, puristettu
Strength
10 mg
Active Ingredient
Cetirizine dihydrochloride
Manufacturer
Orion Corporation
How to Use
Dosage
Adults and children over 12 years: 10 mg (1 lozenge) once daily. Children 6-12 years: 5 mg (half a lozenge) twice daily. For kidney problems, consult a doctor.
Method
Let the lozenge dissolve in your mouth, with or without water. The lozenge can be divided into equal doses.
Important
Do not exceed the recommended daily dose of 10 mg.
Possible Side Effects
COMMON
- •Drowsiness
- •Dizziness
- •Headache
- •Sore throat
- •Runny or stuffy nose (in children)
- •Diarrhea
- •Dry mouth
- •Nausea
- •Fatigue
RARE
- •Restlessness
- •Unusual skin sensations (paresthesia)
- •Abdominal pain
- •Itching (itchy skin)
- •Rash
- •Weakness (extreme fatigue)
- •Feeling unwell
- •Allergic reactions, some severe, including swelling of the face and throat (angioedema)
- •Aggression
- •Confusion
- •Depression
- •Hallucinations
- •Sleeplessness
- •Convulsions
- •Rapid heartbeat
- •Abnormal liver function
- •Hives (urticaria)
- •Swelling
- •Weight gain
- •Low platelet count
- •Tics (involuntary twitching)
- •Taste disorder (altered taste)
- •Fainting
- •Tremors
- •Muscle tone disorder (prolonged abnormal muscle contractions)
- •Involuntary movements
- •Difficulty focusing eyes
- •Blurred vision
- •Uncontrolled eye rolling (oculogyric crisis)
- •Drug rash (drug allergy)
- •Abnormal urination (painful urination and/or difficulty urinating, bedwetting)
- •Memory loss, memory impairment
- •Increased appetite
- •Suicidal thoughts, nightmares
- •Vertigo (feeling of spinning or movement)
- •Urinary retention (inability to completely empty the bladder)
- •Severe itching and/or hives when stopping the medicine
- •Joint pain
- •Muscle pain
- •Rash with pus-filled blisters (acute generalized exanthematous pustulosis)
- •Hepatitis (liver inflammation)
Important Warnings
- Do not use if you have severe kidney disease requiring dialysis.
- Do not use if you are allergic to cetirizine dihydrochloride, hydroxyzine, piperazine derivatives, or any other ingredient in this medicine.
- Consult your doctor if your symptoms do not improve after 3 days or get worse.
- Talk to your doctor if you have epilepsy, risk of seizures, kidney problems, or difficulty urinating.
- Stop using Histec 3 days before any allergy tests.
Show 4 more warnings
- Not for children under 6 years of age.
- If you are pregnant, breastfeeding, or planning to have a baby, talk to your doctor or pharmacist before using this medicine.
- Be cautious when driving or operating machinery, as this medicine might affect your reactions.
- Avoid alcohol while taking this medicine.
Use in Elderly Patients
Category C
Suitable for older adults, with specific precautions. Consider renal impairment. May cause fatigue. (updated 19.9.2025)