Patients with chronic diseases must have stored drugs at home, but some drugs are stored with great care. Some drugs can be exposed to light to accelerate the oxidation and decomposition of the drug, reducing the potency of the drug, some will discolor or produce precipitation to seriously affect the efficacy of the drug, and even increase the toxicity of the drug. Most of the drugs are written in the instructions to be stored away from light. But today we will talk about the need for special preservation from light several easy to ignore and commonly used cardiovascular-related drugs. 1, nitroglycerin cardiovascular emergency drugs, to relieve acute attacks of angina is very useful. The pharmacological mechanism of nitroglycerin is to relax the smooth muscle of blood vessels to achieve the purpose of vasodilation. However, nitroglycerin is volatile and unstable, so it needs to be stored at room temperature and away from light, and the original bottle should be used when carrying it at any time, and nitroglycerin should not be put into other medicine bottles. Normally, nitroglycerin is valid for one year. In life, if you repeatedly open the cap and use the medicine, nitroglycerin will also be affected by light, humidity, temperature and other environmental effects, and the validity period will be shortened from one year to 3-6 months. 2, diphenhydramine antihypertensive drugs cardiovascular system diphenhydramine drugs such as nimodipine, which is a dihydropyridine calcium antagonist, commonly used in cerebrovascular disease and its cause of cerebral blood supply deficiency, cerebrovascular spasm, etc., can also be used for mild, moderate primary hypertension. Nifedipine tablets, which are also commonly used for lowering blood pressure, are also dihydropyridine calcium antagonists. It contains a structure that is unstable to light and is prone to photochemical degradation under light, which affects the stable form of the drug, so it should be stored away from light. 3, aminophylline For the treatment of asthma attacks, aminophylline can effectively relieve the symptoms. However, do not place aminophylline in direct sunlight on the balcony, otherwise it will accelerate the deterioration of aminophylline. Dr. Tomato reminds that the best way to store aminophylline is in a colored bottle in the shade. Need to pay attention to avoid putting a large number of drugs are put into a small pill box, put a day’s dose is more appropriate, to not more than a week’s dose as the limit. Knowledge – the Chinese Pharmacopoeia, the common 8 storage conditions are explained: 1, protected from light (impervious container packaging); 2, airtight (to prevent the entry of dust and foreign objects); 3, sealed (to prevent weathering, moisture absorption, volatilization or foreign objects into); 4, melt sealed or tightly sealed (to prevent the intrusion of air and moisture and to prevent contamination); 5, cool place (not more than 20 ℃); 6 7.Cold place (2～10℃); 8.Normal temperature (10～30℃). Finally, remind everyone that after purchasing the drug must see for themselves whether the instructions require special preservation. Whatever the drug each time you take the drug as soon as possible after the cover, placed in a cool, dry place. Check from time to time whether the drug is expired, found to have dampness, mold, deterioration, timely cleaning and replacement. It is best to keep the outer box when storing, to avoid personal distribution of drugs. Some families use light-transmitting plastic boxes to store medicines, it is best to put the plastic boxes in a place where they will not be exposed to direct sunlight.