Q: I take Diltiazem ER 180 mg capsule, twice a day. Should this be taken with or without food or on an empty stomach? Two hours before a meal? Should this be taken with or without food or on an. Diltiazem hydrochloride, USP is a white to off-white crystalline powder with a bitter taste. It is soluble in water, methanol, and chloroform. The 180 mg and 240 mg capsules contain yellow iron oxide. In addition, the 240 mg capsule also contains black iron oxide and red iron oxide. In addition, the 240 mg capsule also contains black iron oxide and red iron oxide. Adults—At first, 180 milligrams (mg) once a day, either in the morning or evening. Your doctor may adjust your dose if needed. Your doctor may adjust your dose if needed. Children—Use and dose must be determined by your doctor. Prices and coupons for 30 capsules of cartia XT 120mg Set your location for drug prices near you. for drug prices near you Pay as low as $10.00 with GoodRx Gold Cartia XT 180 mg capsule,extended release. Cartia XT 180 mg capsule,extended release. color yellow,orange shape oblong imprint 180 mg, Andrx 598 ‹ Back to Gallery. Cartia XT 120 mg capsule. Uses. Diltiazem is used in the management of Prinzmetal variant angina, chronic stable angina pectoris, supraventricular tachycardias, and hypertension. In a ten-subject randomized, open-label, 4-way crossover study, coadministration of diltiazem (120 mg BID diltiazem SR for 2 weeks) with a single 20 mg dose of lovastatin resulted in 3- to 4-fold increase in mean lovastatin AUC and C max versus lovastatin alone. Pill with imprint 180 mg Andrx 598 is Orange / Yellow, Capsule-shape and has been identified as Cartia XT 180 mg. It is supplied by Watson Laboratories, Inc. The starting dose of Cartia XT to treat hypertension ranges from 180 to 240 mg once daily. To treat angina, the starting dose range is 120 or 180 mg once daily. Cartia XT may interact with To treat angina, the starting dose range is 120 or 180 mg once daily.