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Lightheadedness often accompanies the flu, hypoglycaemia, common cold, or allergies. Dizziness could be provoked by the use of antihistamine drugs, like levocetirizine, or by some antibiotics or SSRIs. Nicotine or tobacco products can cause lightheadedness for inexperienced users. Narcotic drugs, such as codeine, can also cause lightheadedness.
The reason why dehydration can cause lightheadedness is because it can lead to reduced blood pressure and prevent enough blood from reaching the brain. ... difficulty walking, headache or vomiting ...
An infectious cause of nausea and vomiting such as gastroenteritis may present several hours to days after the food was ingested. [15] The contents of the emesis is a valuable clue towards determining the cause.
Norovirus is a highly contagious virus that causes vomiting and diarrhea—and sometimes at the same time, ... Nausea. Vomiting. Diarrhea. Stomach cramps. Headache. Fever. Body aches.
Dizziness is broken down into four main subtypes: vertigo (~25–50%), disequilibrium (less than ~15%), presyncope (less than ~15%), and nonspecific dizziness (~10%). [5] Vertigo is the sensation of spinning or having one's surroundings spin about them. Many people find vertigo very disturbing and often report associated nausea and vomiting. [6]
Many reasons, besides food poisoning and pregnancy, could explain why you feel nauseous. Doctors share what you can do for each cause and how to prevent nausea.
The neurotransmitters implicated in the control of nausea and vomiting include acetylcholine, dopamine, histamine (H1 receptor), substance P (NK-1 receptor), and serotonin (5-HT3 receptor). There are also opioid receptors present, which may be involved in the mechanism by which opiates cause nausea and vomiting.
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