Best Answer: I have been a police officer for almost 40 years. Just like civilian communication, police communication has evolved over the years, Before two-way radios, officers could call into headquarters on call boxes, which were located at various locations on their beats. was just wondering, how exactly did police officers communicate with one another before cellphones were widely used (early 70s era specifically)?
3 Stars. Nitroglycerin is used to treat congestive heart failure, to help prevent frequent chest pain caused by a heart condition known as angina, and to relieve pain caused by chronic anal fissures. The drug is available under the brand names Nitromist, Nitrobid, Nitro-Dur, Nitrostat, Imdur, Isordil and Rectiv.
An Overview of Uses for the Nitroglycerin Patch. The nitroglycerin patch (Minitranâ¢, Nitro-DurÂ®) is a prescription medication specifically approved for preventing angina pectoris associated with coronary artery disease.