Key takeaways
Dicyclomine (Bentyl) and Donnatal (phenobarbital/hyoscyamine/atropine/scopolamine) are both used to treat stomach and intestinal problems, but they have some key differences. Dicyclomine is an anticholinergic medication that specifically targets irritable bowel syndrome (IBS) by blocking acetylcholine to relax stomach muscles and reduce cramping. It is available in generic form and can be taken as tablets, capsules, or liquid, typically four times a day. Dicyclomine is also availanble as an injection. On the other hand, Donnatal is a combination of a barbiturate (phenobarbital) and three anticholinergic medications (hyoscyamine, atropine, and scopolamine). It is used as an add-on therapy for IBS, acute enterocolitis, and duodenal ulcers. Donnatal is available in both tablet and elixir forms and is taken three to four times a day. Unlike dicyclomine, Donnatal is not FDA-approved for effectiveness and can be habit-forming due to the phenobarbital component. Additionally, Donnatal can cause more severe side effects like drowsiness, dizziness, and potential harm to an unborn baby, making it less suitable for pregnant individuals.
