Tramadol hydrochloride in the use of the process of adverse reactions are actually many, as follows: 1, the most common gastrointestinal reactions, all drugs will have gastrointestinal system reactions, such as nausea after taking drugs, patients may vomit after taking, the drug itself on the gastrointestinal tract may have more obvious stimulation; 2, the central system reactions, such as dizziness, anxiety, neurological symptoms are also more common, with The target of action may have a lot to do with the drug itself acts on the central nervous system, which will have a certain effect on the central nervous system transmitters; 3, dry mouth adverse reactions are relatively mild and can be well avoided clinically; 4, there is urinary retention after taking tramadol. Many adverse reactions are related to patient specificity, some patients may be more obvious or sensitive adverse reactions, and the dose has a lot to do with. So in the process of clinical use adhere to the principle of using drugs in small doses as much as possible. Generally, the adverse reactions are relatively mild in small doses, and the adverse reactions are generally reversible and can be recovered quickly after stopping the drug. If the symptoms are more obvious, health care professionals in the use of the process will be promptly dealt with.