Main unwanted side effect of sedating antihistamines

A significant association exists between rhinitis (allergic), asthma, and chronic sinusitis (inflammation of the sinuses for more than 12 weeks) in some individuals.Some evidence suggests that up to 3 of every 5 patients have multiple conditions.Medicines and their possible side effects can affect individual people in different ways.

Paracetamol is thought to relieve pain by reducing the production of prostaglandins in the brain and spinal cord.

Other allergic symptoms include: People with allergic rhinitis also have a higher incidence of asthma and eczema, which are also mainly allergic in origin.

Seasonal allergic rhinitis (hay fever) is usually caused by pollen in the air, and sensitive patients have symptoms during peak times during the year.

Post-nasal drip may lead to chronic sore throat, chronic cough, or throat clearing.

Post-nasal drip can be caused by excessive or thick mucus secretions or impairment in the normal clearance of mucus from the nose and throat. Rhinitis can be either acute or chronic, and is categorized into three areas: allergic rhinitis, non-allergic rhinitis, and mixed rhinitis (a combination of allergic and non-allergic).

Psychotic illness, and particularly schizophrenia, is considered to be caused by overactivity of dopamine in the brain.

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