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- What is diphenoxylate and atropine, and how does it work (mechanism of action)?
- What brand names are available for diphenoxylate and atropine?
- Is diphenoxylate and atropine available as a generic drug?
- Do I need a prescription for diphenoxylate and atropine?
- What are the side effects of diphenoxylate and atropine?
- What is the dosage for diphenoxylate and atropine?
- Which drugs or supplements interact with diphenoxylate and atropine?
- Is diphenoxylate and atropine safe to take if I'm pregnant or breastfeeding?
- What else should I know about diphenoxylate and atropine?
What is the dosage for diphenoxylate and atropine?
In adults, the usual dose is 5 mg (2 tablets) of diphenoxylate three to four times per day initially. Thereafter, the dose may be decreased to 2.5 mg (1 tablet) two to three times a day. The dose for children (2 to 12 years old) is 0.3 to 0.4 mg/kg/day in four divided doses. If diarrhea is not better within 48 hours, diphenoxylate is not likely to be effective with more prolonged treatment.
Which drugs or supplements interact with diphenoxylate and atropine?
The combination of diphenoxylate and monoamine oxidase inhibitors (MAO's), for example, isocarboxazid (Marplan), phenelzine (Nardil), tranylcypromine (Parnate), and procarbazine (Matulane) can cause severe high blood pressure with the possibility of a cerebrovascular accident (stroke).
Drugs which increase the propulsion of intestinal contents theoretically can reduce the effectiveness of diphenoxylate. Such drugs include bethanechol (Urecholine), cisapride (Propulsid), metoclopramide (Reglan), and erythromycin.
Drugs which decrease the propulsion of intestinal contents may exaggerate the effects of diphenoxylate and cause constipation. Such drugs include hyoscyamine (Levsin; Cystospaz), antihistamines such as hydroxyzine (Vistaril, Atarax) and diphenhydramine (Benadryl), opiate agonists such as oxycodone (Percocet) and hydrocodone (Vicodin, Norco, etc.), some phenothiazine antipsychotics such as chlorpromazine (Thorazine), thioridazine (Mellaril) and triflupromazine (Stelazine), and some tricyclic antidepressants such as amitriptyline (Elavil, Endep), amoxapine (Asendin), clomipramine (Anafranil), doxepin (Sinequan), imipramine (Tofranil), nortriptyline (Pamelor), protriptyline (Vivactil), and trimipramine (Surmontil).
Taking diphenoxylate with alcohol or other chemicals or medications that can depress the central nervous system may cause excessive sedation. Such drugs include barbiturates, benzodiazepines, for example, lorazepam (Ativan), diazepam (Valium), temazepam (Restoril), oxazepam (Serax), or clonazepam (Klonopin), zolpidem (Ambien), narcotics, and tricyclic antidepressants (listed above).
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