Before taking this medication, tell your doctor if you are using any of the following drugs:
- antidepressants such as amitriptyline (Elavil, Etrafon), clomipramine (Anafranil), imipramine (Janimine, Tofranil), and others;
- atropine (Donnatal, and others), benztropine (Cogentin), dimenhydrinate (Dramamine), glycopyrrolate (Robinul), mepenzolate (Cantil), methscopolamine (Pamine), or scopolamine (Transderm-Scop);
- bladder or urinary medications such as darifenacin (Enablex), flavoxate (Urispas), oxybutynin (Ditropan, Oxytrol), tolterodine (Detrol), or solifenacin (Vesicare);
- a bronchodilator such as ipratropium (Atrovent) or tiotropium (Spiriva); or
- irritable bowel medications such as dicyclomine (Bentyl), hyoscyamine (Anaspaz, Cystospaz, Levsin, and others), or propantheline (Pro-Banthine).
This list is not complete and there may be other drugs that can interact with guaifenesin and hydrocodone. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.
