RxSideEffect.org: The effects of drugs vary depending upon the drug taken

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Like most possible medicines, muscle relaxant drugs can cause side effects. These unwanted effects are often mild, but sometimes they are more serious and can have a major impact on health or quality of life. Most of modern muscle relaxants are very well tolerated and only rarely cause serious side effects. The effects of drugs can vary depending upon the kind of drug taken, how much is taken, how often it is used, how quickly it gets to the brain, and what other drugs, food, or substances are taken at the same time. Effects can also vary based on the differences in body size, shape, and chemistry. Muscle relaxants differ in how commonly they cause particular side effects. Medications are prescribed for a specific purpose, and anything else the drug does is a side effect. Some side effects are mild, like a slight headache. Others, like liver damage, can be severe and, in rare cases, fatal. Some go on for just a few days or weeks, but others might continue as long as you take a medication, or even after you stop. Some occur within days or weeks of starting a drug. Others may only show up after months or years of therapy.

Muscle relaxers can be addictive, and also can have negative side effects from their use, including physical body symptoms, impaired thinking and functioning, risk of addition and possible dangerous interactions with other medications. As with many medications, there are numerous side effects possible from muscle relaxers. These include upset stomach, nausea and vomiting. Some brands may cause an unpleasant taste or dry mouth. The most common side effect when taking muscle relaxers is drowsiness, and this is found with many patients. These medications should be used with caution in people driving motor vehicles or operating heavy machinery.

In more severe cases, muscle relaxers' high can cause heart failure and paralysis. Due to the side effects associated with use of these drugs, individuals are advised to not drive or operate machinery after use and it is often recommended the drug be taken prior to going to bed. One very serious risk with regard to taking muscle relaxers is that they can impair your thinking and functioning, due to their sedative effect. It is common to feel drowsy as a result of taking these, as well as lightheaded, unsteady on your feet or less alert than normal. Impaired eyesight, thought process and decision making are common as well. As a result it is strongly advised to avoid driving or operating machinery while taking muscle relaxers. Muscle relaxers are often abused in combination with another substance to produce greater highs and experiences of euphoria. Some types of muscle relaxers, especially when taken in excess or in combination with other substances, can cause hallucinations, an irregular heartbeat, as well as severe allergic reactions.