Orygen Youth Health: The Royal Children's Hospital Melbourne. Antihistamine poisoning. This guideline has been adapted for statewide use with the support of the Victorian Paediatric Clinical Network. See also Poisoning — acute guidelines for initial management Resuscitation Anticholinergic Poisoning Key Points The majority of antihistamine poisonings will only require supportive care. Large overdoses of H1 Antihistamines are associated with cardiac arrhythmia and may require close monitoring and specific treatment.
Consider investigating for common co-ingestions depending on the formulation, such as paracetamol levels. For 24 hour advice, contact the Victorian Poisons Information Centre on 13 11 26 Background Antihistamines are commonly recommended for the treatment of allergic symptoms. Sedating antihistamines As well as their H1 effect, sedating antihistamines can have alpha adrenergic, anticholinergic and serotonergic effects.
Risk Assessment History: Intentional poisoning or accidental Dose: Stated or likely dose taken Presented as syrup, immediate or modified- release tablets If possible determine the exact name and tablet size. Pathology: Paracetamol level in all intentional overdoses Acute Management 1. Resuscitation Standard procedures and supportive care Sedating antihistamines In Adolescents, consider investigating for common co-ingestions paracetamol, alcohol, etc.
In mild cases, an individual may be able to use self-care at home. If the person is experiencing serious symptoms, they may need hospitalization, including heart monitoring, intravenous IV fluids, and medication. In some cases, doctors may give a person activated charcoal, which helps prevent the absorption of some medications and chemicals in the gut.
They may also use ipecac syrup, which causes the person to vomit. This can cause any excess medication to leave the body in the vomitus. Antihistamines may be first generation sedating or second generation nonsedating. These two types may lead to different reactions if a person takes too much. First generation antihistamines are more likely to cross the blood-brain barrier. This means they can make people dizzy or drowsy, even in normal doses.
Second generation antihistamines are newer drugs and are less likely to have these effects. Nonetheless, people can overdose on both types. Some experts say first generation antihistamines are more likely to result in death from accidents or overdoses than their second generation counterparts. These newer antihistamines are less likely to cause drowsiness and dizziness.
Research has found them less likely to cause dangerous effects if a person takes too much. Antihistamines are typically safe when a person takes the correct amount.
However, as with any medication, they can cause serious adverse effects if someone takes too much. People must keep antihistamines and all medications out of reach of children. Some antihistamines are safe for children to take, but it is important to ask a doctor or pharmacist about the right dose. Different antihistamines have different dosages. It is vital to read labels carefully to be sure a person is not taking too much.
Dioxins are chemical compounds that are hazardous to health. Manufacturers in the United States no longer produce them, but they are generally present…. In this article, we examine the symptoms of poisoning from organophosphate, a form of insecticide. We also look at the risks and treatment options.
Gasoline and gasoline vapors are toxic and can seriously damage a person's health. Learn more about the health effects of gasoline exposure here. However, if cetirizine makes you vomit or have severe diarrhoea for more than 24 hours, your contraceptive pills may not protect you from pregnancy.
Check the pill packet to find out what to do. Read more about what to do if you're on the pill and you're being sick or have diarrhoea. It'll help if you do not spend too much time outside if the pollen count is high. Page last reviewed: 15 October Next review due: 15 October Cetirizine - Brand names: Benadryl Allergy, Piriteze Allergy, Zirtek Allergy On this page About cetirizine Key facts Who can and cannot take cetirizine How and when to take cetirizine Side effects How to cope with side effects of cetirizine Pregnancy and breastfeeding Cautions with other medicines Common questions about cetirizine.
About cetirizine Cetirizine is an antihistamine medicine that helps the symptoms of allergies. It's used to treat: hay fever conjunctivitis red, itchy eye eczema hives urticaria reactions to insect bites and stings some food allergies Cetirizine is known as a non-drowsy antihistamine. It comes as tablets, capsules and as a liquid that you swallow.
Help us improve our website Can you answer a quick question about your visit today? It's usual to take cetirizine once a day. Children aged under 12 take it twice a day. Cetirizine is classed as a non-drowsy antihistamine, but some people still find it makes them feel quite sleepy.
Common side effects include headaches, dry mouth, feeling sick, dizziness and diarrhoea. Some brands of cetirizine come as capsules. These may contain soya oil. Do not take cetirizine capsules if you are allergic to peanuts or soya. Some Benadryl products do not contain cetirizine, but a different antihistamine such as acrivastine.
Most adults can take cetirizine. Children Children aged 1 and over can take cetirizine liquid if prescribed by their doctor. Children aged 2 and over can take cetirizine liquid bought from pharmacies or prescribed by their doctor. Children aged 6 and over can take cetirizine tablets and liquid that you buy from pharmacies and supermarkets. Children aged 12 and over can take cetirizine capsules, tablets and liquid that you buy from pharmacies and supermarkets.
Who may not be able to take cetirizine Cetirizine is not suitable for some people. To make sure it's safe for you, tell your doctor or pharmacist if you: have ever had an allergic reaction to cetirizine or any other medicine have an allergy to food additives have an allergy to peanuts or soya have kidney failure have epilepsy or another health problem that puts you at risk of having seizures or fits have a condition that means you have difficulty peeing are due to have an allergy test — taking cetirizine may affect the results, so you might need to stop taking it a few days before the test.
The usual dose for adults is 10mg once a day. Doses are usually lower for people with kidney problems. Children For children between 6 to 11 years of age, the usual dose is 5mg, twice a day.
Try to leave 10 to 12 hours between doses. So, one first thing in the morning, and one before bedtime. For children between 2 to 5 years of age, the dose is 2. For children between 1 to 2 years of age, your doctor will use their weight or age to work out the right dose. How to take it You can take cetirizine with or without food, but always take the tablets or capsules with a drink of water, milk or squash. When to take it You may only need to take cetirizine on a day you have symptoms — for example, if you have been in contact with something that has triggered your allergy, like animal hair.
What if I forget to take it? Do not take 2 doses to make up for a forgotten dose. What if I take too much? Common side effects The most common side effect of cetirizine is feeling sleepy and tired. Talk to your doctor or pharmacist if these side effects bother you or do not go away: headaches dry mouth feeling sick nausea feeling dizzy diarrhoea sore throat sneezing or blocked and runny nose Children are more likely to get diarrhoea, sneezing or a blocked and runny nose than adults.
Serious side effects It's rare to have a serious side effect with cetirizine. Serious allergic reaction In rare cases, it's possible to have a serious allergic reaction anaphylaxis to cetirizine.
Information: You can report any suspected side effect using the Yellow Card safety scheme. Visit Yellow Card for further information. What to do about : feeling sleepy and tired — try a different non-drowsy antihistamine. If this does not help, talk to your doctor. It's best not to drink too much alcohol. Ask your pharmacist to recommend a painkiller for your headaches, but they usually go away after the first week of taking cetirizine.
Talk to your doctor if your headaches last longer than a week or are severe. It may also help if you stick to simple meals and avoid rich or spicy food. If you begin to feel dizzy, lie down so that you do not faint, then sit until you feel better. Do not drive, cycle or use tools or machines if you feel dizzy or a bit shaky. Speak to a pharmacist if you have signs of dehydration , such as peeing less than usual or having dark, strong-smelling pee.
Do not take any other medicines to treat diarrhoea without speaking to a pharmacist or doctor. If your symptoms last longer than a week, ask your pharmacist or doctor for advice. Children under 16 must not be given aspirin. Cetirizine and breastfeeding If your doctor or health visitor says your baby is healthy, you can take cetirizine while breastfeeding. Non-urgent advice: Tell your doctor if you're:. Mixing cetirizine with herbal remedies and supplements There might be a problem taking some herbal remedies and supplements alongside cetirizine, especially ones that cause sleepiness, a dry mouth, or make it difficult to pee.
0コメント