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MEDICATION FOR TREATING HEADACHE: ANALGESICS
Analgesics are medications used to stop pain by raising your pain threshold and in that way reducing the painful experience. Analgesics generally do not affect the cause of the headache but simply lessen the sensation of pain during the period of the medication’s effectiveness, usually two to six hours. This type of therapy has the advantage of being simple, but analgesic treatment is not always effective in reducing pain. Most analgesic drugs cannot be taken safely on a daily basis. While mild analgesics, like aspirin, are effective for many headaches, some
analgesics?including aspirin?may be capable of injuring organs such as the stomach, liver, and kidneys with prolonged use.
Numerous problems surround the use of analgesics in addition to the above. Some patients experience a “high” feeling from certain analgesics, and this may result in drug abuse and subsequent habituation. Another very real problem created by using analgesics is that they mask pain. Pain is a symptom. It suggests that something is wrong. Covering up the pain before complete evaluation of its cause is determined can be hazardous because the patient and even the physician are deprived of an important reminder that a problem exists and they can be lulled into a false sense of complacency.
Another significant problem regarding the use of analgesics is that daily use may actually intensify your perception of pain after the analgesic is metabolized, about four hours after ingestion. Recent research suggests that this can set up a “rebounding” cycle, requiring continued use of analgesics in order to sustain relief. In other words, while the available data is still sparse, researchers in the field have observed some evidence to suggest that daily use of analgesics may actually enhance, through various chemical reactions, a person’s perception of pain. This process may be somewhat similar to the phenomenon observed by many people when an itchy rash is scratched. The itch is a form of pain created by irritation of the nerve endings in the skin. While the nails are scratching the itchy area, the itch is relieved and a pleasurable sensation is experienced. When scratching ceases, the itch may actually become more intense?even painful?than prior to being scratched. It is believed that this phenomenon may represent a “hypersensitization” process, due to irritation of the pain receptors from repeated scratching.
Also related to the regular use of analgesics is the possibility that pain, being a biological reaction, is “trainable,” not unlike one’s ability to wake up at a customary time each morning. We have all observed that once the body becomes used to a particular function, it will develop a symptom in order to obtain that to which it has become accustomed. For example, if one regularly goes to bed at 11 o’clock each evening, a sense of tiredness will develop around that time. Depending upon the hours that one regularly eats, hunger will intensify as that time approaches. The repetitive use of analgesics may result in a similar relationship. If the body develops a sense of acceptance of daily analgesics and, for one of a variety of poorly understood reasons, begins to depend upon these analgesics, the body will develop a symptom to get that which it seeks?in the case of analgesics, pain.
Analgesics vary in potency, side effects, and cost. They range from simple analgesics, such as aspirin, to narcotic analgesics, like codeine and morphine. A variety of preparations containing one or more analgesics in combination with other drugs, including antihistamines, stimulants, sedatives, nasal decongestants, and anti-nauseants, are available as prescription and
over-the-counter, nonprescription drugs.
Before discussing some specific analgesics, you should know that the dose of one drug is not necessarily equivalent to an equal dose of another drug. For example, 50 milligrams (mg.) of Drug X may be fatal, whereas 500 milligrams (mg.) of Drug Y may be an ideal dose. Also, people differ dramatically in their response to similar doses of the same drug.
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