The primary symptoms of<unk>  are lightheadedness or dizziness. If the blood pressure is sufficiently low, fainting (syncope) may occur. Low blood pressure is sometimes associated with certain symptoms, many of which are related to causes rather than effects of<unk> : * chest pain *<unk> ortness of breath * irregular heartbeat * fever higher than 38.3 °C (101 °F) * headache * stiff neck * severe upper back pain * cough with sputum * prolonged diarrhea or vomiting *<unk> akiness <unk> ivering) * loss of appetite * dyspepsia (indigestion) * dysuria (painful urination) * acute, life-threatening allergic reaction * seizures * loss of consciousness * profound fatigue * temporary blurring or loss of vision * black tarry stools
Hypotension
Bradypnea
Bradycardia
Apnea
Hypopnea
Sedation
Hypsarrhythmia
Somnolence