Hydroxyzine tablets
Revisado por Sid DajaniÚltima atualização por Michael Stewart, MRPharmSÚltima atualização 27 Abr 2023
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Hydroxyzine is an antihistamine. It is taken to relieve itching.
The most common side-effect is drowsiness. This may affect your ability to drive.
Neste artigo:
About hydroxyzine
Tipo de medicamento | An antihistamine |
Usado para | Itching, urticaria |
Disponível como | Comprimidos |
Hydroxyzine belongs to a group of medicines known as sedating anti-histamínicos. It is used to relieve itching caused by some skin conditions, such as nettle rash (urticaria).
Exposure to substances such as pollen, pet fur, house dust or insect bites can cause some people to produce an excess of a chemical called histamine. This release of histamine can then cause a skin rash and/or itchiness. Because hydroxyzine blocks the effects of histamine, it helps relieve symptoms like these.
Before taking hydroxyzine
Voltar ao conteúdoTo make sure that this is the right treatment for you, before you start taking hydroxyzine it is important that you discuss the treatment with a doctor or pharmacist if:
You are pregnant, trying for a baby or breastfeeding.
You are over 65 years of age. This is because you could be more susceptible to side-effects.
You have a problem with the way your liver works, or if you have a problem with your kidneys.
You have a condition which causes increased pressure in your eyes, such as glaucoma.
You have prostate problems, or if you have been experiencing any difficulty passing urine.
You know you have an unusual heart rhythm.
You know you have a blockage in your small intestines.
You have epilepsy.
You have any long-term breathing problems, such as asthma or bronchitis.
You have a rare inherited blood condition known as porphyria.
Você está tomando outros medicamentos. Isso inclui quaisquer medicamentos que você esteja tomando que estejam disponíveis para compra sem receita médica, bem como medicamentos fitoterápicos e complementares.
You have ever had an allergic reaction to a medicine.
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How to take hydroxyzine
Voltar ao conteúdoBefore you start this treatment, read the manufacturer's printed information leaflet from inside your pack. The manufacturer's leaflet will give you more information about hydroxyzine and will provide a full list of the side-effects which you may experience from taking it.
Take hydroxyzine exactly as your doctor tells you to. Usually, it is sufficient to take one dose at night to control symptoms. Where this is not the case, you may be asked to take 2 or 3 doses during the day in addition to your dose at night.
You can take hydroxyzine before or after food. Some people find it helps to swallow the tablets with a drink of water.
If you forget to take a dose, don't worry, just take the next dose when it is due and then continue as before. Do not take two doses together to make up for a forgotten dose.
Most people only need to take an antihistamine for a short while when they have symptoms. You should stop taking hydroxyzine once your symptoms have eased.
Obtendo o máximo do seu tratamento
Voltar ao conteúdoHydroxyzine can cause drowsiness. If this happens to you, do not drive and do not use tools or machines. Alcohol will make the drowsiness worse, so it is best not to drink alcohol while you are on hydroxyzine.
If you are having an operation or any treatment or tests (particularly if it is to test for an allergy), tell the person due to carry out the treatment that you are taking an antihistamine. This is because you may be advised to stop taking hydroxyzine for a short while before some allergy tests.
Hydroxyzine may cause some people's skin to become more sensitive to sunlight than normal. Use a sunscreen that protects against UVA light and has a sun protection factor (SPF) of at least 15, especially in strong sunlight or until you know how your skin reacts. Do not use sunbeds.
If you buy any medicines, check with a pharmacist that they are safe to take with an antihistamine. This is because a number of other medicines can interfere with the way hydroxyzine works and can increase the risk of side-effects.
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Can hydroxyzine cause problems?
Voltar ao conteúdoAlong with their useful effects, most medicines can cause unwanted side-effects although not everyone experiences them. The table below contains the most common ones associated with hydroxyzine. You will find a full list in the manufacturer's information leaflet supplied with your medicine. The unwanted effects often improve as your body adjusts to the new medicine, but speak with your doctor or pharmacist if any continue or become troublesome.
H ydroxyzine side-effects | O que posso fazer se passar por isso? |
Feeling dizzy or sleepy, and blurred vision | Não dirija e não use ferramentas ou máquinas. Não consuma álcool |
Dor de cabeça | Beba bastante água e peça ao seu farmacêutico para recomendar um analgésico adequado. Se as dores de cabeça continuarem, informe o seu médico |
Boca seca | Try sucking sugar-free sweets or chewing sugar-free gum |
Difficulty passing urine | Speak with your doctor if this becomes troublesome |
Stomach upset | Mantenha-se em refeições simples - evite alimentos ricos ou picantes |
If you experience any other symptoms which you think may be due to this medicine, speak with your doctor or pharmacist for further advice.
How to store hydroxyzine
Voltar ao conteúdoMantenha todos os medicamentos fora do alcance e da vista das crianças.
Armazene em local fresco e seco, longe de calor e luz diretos.
Informações importantes sobre todos os medicamentos
Voltar ao conteúdoInformações importantes sobre todos os medicamentos
Nunca tome mais do que a dose prescrita. Se suspeitar que você ou outra pessoa possa ter tomado uma overdose deste medicamento, vá ao departamento de acidentes e emergências do hospital local. Leve o recipiente com você, mesmo que esteja vazio.
Este medicamento é para você. Nunca o dê a outras pessoas, mesmo que a condição delas pareça ser a mesma que a sua.
Não guarde medicamentos vencidos ou indesejados. Leve-os à sua farmácia local, que se encarregará de descartá-los para você.
Se você tiver alguma dúvida sobre este medicamento, pergunte ao seu farmacêutico.
Relatar efeitos colaterais de um medicamento ou vacina
Se você sentir efeitos colaterais, pode relatá-los online através do site Cartão Amarelo.
Vídeos selecionados para Medicamentos para alergia

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Leitura adicional e referências
- Medicamentos Completo BNF 89ª Edição; Associação Médica Britânica e Sociedade Real de Farmácia da Grã-Bretanha, Londres.
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Histórico do artigo
As informações nesta página são escritas e revisadas por clínicos qualificados.
Próxima revisão prevista: 26 Abr 2026
27 Abr 2023 | Última versão

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