Read your question and I am sorry about your complaints. The drugs that you mention are not used to treat tinnitus and vertigo, at least not directly. Zestril is used to lower high blood pressure, lipantil and ezetrol to lower blood lipids. These are chronic conditions, the aim of the drugs is not to cure but to lower and control them in order to limit their negative effects mainly in blood vessels. Aspirin is used as a blood thinner to lower the risk of infarction (lack of blood supply, people with high blood pressure and cholesterol are at risk). So what I am trying to say is that these drugs could be used for a lifetime. If your doctor gave them to you for the vertigo I assume they suspected they were related to high blood pressure or narrowing of blood vessels with insufficient blood flow to your brain. The causes for tinnitus and vertigo can be variable, sometimes related to your inner ear and a otolaryngology consult could be advisable. However since you have that persistent pins and needles feeling in you left hand I think a neurologist should evaluate you first for neurologic signs. According to his findings he will decide whether other exams are necessary like ultrasound of cervical blood vessels or even Angio MRI of brain and/or cervical region, to look for involvement of brain or blood vessels which a brain CT scan might miss. Hope my information was of some help to you. Feel free to ask for further question.