Buscopan IBS relief tablets contain hyoscine butylbromide as their active ingredient. This medication is an antispasmodic, which works by relaxing the smooth muscles in the walls of the intestines thereby improving abdominal spasms. It can be bought over the counter to relieve stomach spasms and cramps that have previously been diagnosed by a doctor as irritable bowel syndrome.You should consult your doctor if you have taken Buscopan IBS Relief tablets before but you are 40 years or over and it has been some time since your last attack or if your symptoms are different this time. You should also consult your doctor if you have recently passed blood from your bowel, you are suffering from severe constipation, you are currently feeling sick or vomiting, you have recently lost your appetite or are losing weight, you have difficulty or pain when passing urine, you have a fever or if you have recently travelled abroad.You should consult your doctor if your symptoms change or get worse, or if your symptoms have not improved after 14 days of using this medicine.Side effects may include blurred vision which can affect your ability to drive or operate machinery. If this occurs do not drive or operate machinery. Other possible side effects include an increase in heart rate (tachycardia), dry mouth, reduced ability to sweat or an allergic skin reaction. Difficulty in passing urine (urinary retention) and hypersensitivity reactions such as narrowing of the airways(bronchospasm), swelling of the lips, throat and tongue (angioedema), oritchyrash are very rare. These side effects listed may not include all of those reported in the medicines product literature.If you experience a dry mouth as a side effect you may find that medicines designed to dissolve and be absorbed from under the tongue, eg sublingual glyceryl trinitrate tablet, become less effective. This is because the tablets dont dissolve properly in a dry mouth, so to resolve this try having a drink of water before taking the GTN tablets.Consult your doctor immediately if while using this medicine you experience any of the following: red and painful eye possibly with headache, loss of vision or seeing haloes around lights. These symptoms may be caused by an increase in the pressure inside the eyeball and require urgent investigation by your doctor.This medication should not be used if you are allergic to any of the ingredients or if you have abnormal muscle weakness (myasthenia gravis), abnormally large or dilated large intestine (megacolon), closed angle glaucoma or rare hereditary fructose intolerance problems, glucose-galactose malabsorption or sucrase-isomaltase insufficiency (as Buscopan IBS relief tablets contain sucrose).Buscopan IBS Relief tablets are not recommended for children under 12 years of age.Buscopan IBS Relief tablets are not recommended if you are pregnant or trying for a baby, you should consult your doctor first. This medicine should only be used if the expected benefit to the mother is greater than the possible risk to the foetus, particularly in the first trimester. Seek medical advice from your doctor.It is not known if this medicine passes into the breast milk so if you are breastfeeding you should consult your doctor before taking it. It should only be used in nursing mothers if the benefits to the mother outweigh the risks to the nursing infant.