Some expired drugs have no obvious appearance changes with naked eyes, but their internal changes and hazards are unpredictable. It not only affects the curative effect (ineffectiveness, reduced curative effect), delays the illness, but also brings various injuries, such as easily inducing allergies, irritation, pain and poisoning.
Nitroglycerin is used for acute attack of stable angina pectoris. If it fails, it may lead to serious myocardial infarction or aggravate pain. Epinephrine injected subcutaneously or intramuscularly can resist shock, and the phenolic hydroxyl in its structure is easily oxidized, which can lead to cardiac arrest, hypertensive crisis and even death.
Extended data:
Light will affect the medicine.
The ultraviolet energy of light is extremely high, which is the catalytic factor for the chemical changes of drugs. Long-term illumination can directly cause or promote chemical reactions such as oxidation, reduction, decomposition and polymerization of drugs, resulting in color changes and reduced or even ineffective efficacy.
Such as vitamin C, K, B 1, B2, B6, B 12 tablets and injections, lysine and sodium glutamate injections, anti-tuberculosis drugs such as sodium p-aminosalicylate, isoniazid tablets and injections, rifandine tablets, antiasthmatic drugs such as aminophylline tablets or injections, theophylline tablets, procoagulants such as carbachol tablets and phenylethylamine injections.
Diuretics furosemide tablets and injections, itaconic acid tablets, bumetanide tablets and injections, hydrochlorothiazide tablets, acetazolamide tablets, isosorbide solution, disinfection and antiseptic drugs such as hydrogen peroxide solution, ethacridine solution, nitrofurazone solution, silver nitrate solution, povidone iodine solution, silver sulfadiazine cream, eye drops, prolonium iodide, physostigmine salicylate, pilocarpine, ribavirin, etc.
People's Network-Why can't expired drugs be used again?