• Basic Info
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• Interactions

You may be more likely to have hyperglycemia (high blood sugar) if you are taking tolazamide with other drugs that raise blood sugar. Drugs that can raise blood sugar include:

• isoniazid;

• diuretics (water pills);

• steroids (prednisone and others);

• phenothiazines (Compazine and others);

• thyroid medicine (Synthroid and others);

• birth control pills and other hormones;

• seizure medicines (Dilantin and others);

• diet pills; and

• medicines to treat asthma, colds or allergies.

You may be more likely to have hypoglycemia (low blood sugar) if you are taking tolazamide with other drugs that lower blood sugar. Drugs that can lower blood sugar include:

• nonsteroidal anti-inflammatory drugs (NSAIDs);

• aspirin or other salicylates (including Pepto-Bismol);

• sulfa drugs (Bactrim and others);

• a monoamine oxidase inhibitor (MAOI);

• beta-blockers (Tenormin and others);

• probenecid (Benemid); or

• a blood thinner (warfarin, Coumadin and others).

This list is not complete and there may be other drugs that can interact with tolazamide. 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.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Hypoglycemia, or low blood sugar, is the most common side effect of tolazamide. Symptoms of low blood sugar may include headache, nausea, hunger, confusion, drowsiness, weakness, dizziness, blurred vision, fast heartbeat, sweating, tremor, trouble concentrating, confusion, or seizure (convulsions). Watch for signs of low blood sugar. Carry a piece of non-dietetic hard candy or glucose tablets with you in case you have low blood sugar.

Call your doctor at once if you have any of these serious side effects:

• chest pain, shortness of breath, feeling like you might pass out;

• easy bruising or bleeding, unusual weakness; or

• extreme thirst with headache, nausea, vomiting, and weakness.

Less serious side effects may include:

• dizziness or weakness;

• headache, tired feeling;

• mild nausea, heartburn, full feeling;

• skin rash, redness, or itching; or

• increased skin sensitivity to sunlight.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.