Sedating antihistamines examples
Antihistamines do not stop the formation of histamine nor do they stop the conflict between the Ig E and antigen.
Therefore, antihistamines do not stop the allergic reaction but protect tissues from some of its effects.
Antihistamines are commonly used to treat the symptoms of allergies and reactions to bites and stings.
Antihistamines generally come as tablets, creams, ointments and eye drops to reduce conditions such as watering, itchy eyes, running, itchy nose, sneezing, swelling and irritation of the eys, and to reduce hives, nettle rash and other allergic reactions.
The antihistamine mizolastine (Mizollen - prescription only) can interact with some medicines to cause abnormal heart rhythms.
Some cough and cold remedies contain antihistamine, so don't take these with an antihistamine medicine for allergy as you may end up taking too much antihistamine overall.
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You should also avoid alcohol if you are on a sedating antihistamine as they potentiate the effect of alcohol on the nervous system.
Antihistamine side effects that very occasionally occur include urine retention in males and fast heart rate.
As the name suggests, antihistamines block the action of histamine. Never drive or operate machinery when taking one of these drugs and be aware that the effect may persist for some time, or into the next day if you take a dose at night.
Their action on the brain means that they have a sedating effect.
These are older drugs which are rather non-specific in their action.
The main side effect of the sedating antihistamines is, as you might expect, drowsiness.