• Basic Info
• Top Questions
• Interactions

Many other medicines may increase or decrease the effects of chlorpropamide or affect your condition. Before taking chlorpropamide, tell your doctor if you are taking any of the following medicines:

• aspirin or another salicylate such as magnesium/choline salicylate (Trilisate), salsalate (Disalcid, others), choline salicylate (Arthropan), magnesium salicylate (Magan), or bismuth subsalicylate (Pepto-Bismol);

• a nonsteroidal anti-inflammatory drug (NSAID) such as ibuprofen (Motrin, Advil, Nuprin, others), ketoprofen (Orudis, Orudis KT, Oruvail), diclofenac (Voltaren, Cataflam), etodolac (Lodine), indomethacin (Indocin), nabumetone (Relafen), oxaprozin (Daypro), naproxen (Anaprox, Naprosyn, Aleve), and others;

• a sulfa-based drug such as sulfamethoxazole-trimethoprim (Bactrim, Septra), sulfisoxazole (Gantrisin), or sulfasalazine (Azulfidine);

• a monoamine oxidase inhibitor (MAOI) such as isocarboxazid (Marplan), tranylcypromine (Parnate), or phenelzine (Nardil);

• a beta-blocker such as propranolol (Inderal), atenolol (Tenormin), acebutolol (Sectral), metoprolol (Lopressor), and others;

• a diuretic (water pill) such as hydrochlorothiazide (HCTZ, Hydrodiuril), chlorothiazide (Diuril), and others;

• a steroid medicine such as prednisone (Deltasone, Orasone, others), methylprednisolone (Medrol, others), prednisolone (Prelone, Pediapred, others), and others;

• a phenothiazine such as chlorpromazine (Thorazine), fluphenazine (Prolixin, Permitil), prochlorperazine (Compazine), promethazine (Phenergan), and others;

• phenytoin (Dilantin);

• isoniazid (Nydrazid); or

• prescription, over-the-counter, or herbal cough, cold, allergy, or weight loss medications.

You may require a dosage adjustment or special monitoring if you are taking any of the medicines listed above.

Drugs other than those listed here may also interact with chlorpropamide or affect your condition. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including herbal products.

Stop taking chlorpropamide and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives).

Other, less serious side effects from chlorpropamide result mostly from blood sugar levels that are either too high or too low. You should be familiar with the symptoms of both high and low blood sugar levels and know how to treat both conditions. Also, be sure your family and close friends know how to help you in an emergency situation.

Low blood sugar may occur when too much chlorpropamide is taken; when meals are missed or delayed; if you exercise more than usual; during illness, especially with vomiting or diarrhea; if you take other medications; after drinking alcohol; and in other situations.

Hypoglycemia or Low blood sugar has the following symptoms:

• shaking;

• headache;

• cold sweats;

• pale, cool skin;

• anxiety; and

• difficulty concentrating.

Keep hard, sugary candy; chocolate; fruit juice; or glucose tablets on hand to treat episodes of low blood sugar.

Increased blood sugar may occur when not enough chlorpropamide is taken; if you eat significantly more food than usual; if you exercise less than usual; if you take other medications; during fever or other illness; and in other situations.

Hyperglycemia or High blood sugar has the following symptoms:

• increased thirst,

• increased hunger, and

• increased urination.

There may be an increased risk of death due to cardiovascular (heart and blood vessels) complications with the use of chlorpropamide when compared to the treatment of diabetes with diet or diet plus insulin. The long-term use of chlorpropamide should be discussed with your doctor.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.