Do not take Tadapox if:

• you are allergic to any ingredient in Tadapox.
• you have severe kidney or liver problems.
• you have a history of heart problems (for example, low blood pressure, or uncontrolled high blood pressure).
• you have had a heart attack within the past 90 days or you have had severe heart failure or a stroke within the past 6 months.
• you are taking nitrates.
• you use certain recreational drugs called "poppers" (eg, amyl nitrate or nitrite, butyl nitrate or nitrite).

Contact your doctor or health care provider right away if any of these apply to you.

Some medical conditions may interact with Tadapox. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

• if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
• if you have allergies to medicines, foods, or other substances
• if you have blood cell problems (eg, sickle cell anemia)
• if you have a history of liver or kidney problems, high or low blood pressure, ulcers, bleeding problems, heart problems (eg, heart failure, irregular heartbeat, aortic stenosis, angina), or blood vessel problems
• if you have a history of heart attack, stroke, or life-threatening irregular heartbeat.

Contact your doctor if you use:

Alpha-blockers (eg, doxazosin), medicines for high blood pressure, nitrates (eg, isosorbide, nitroglycerin), or nitroprusside because severe low blood pressure with dizziness, lightheadedness, and fainting may occur.

Ask your health care provider if Tadapox may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

Important safety information:

• Tadapox may cause dizziness, drowsiness, fainting, or blurred vision. These effects may be worse if you take it with alcohol or certain medicines. Use Tadapox with caution. Do not drive or perform other possible unsafe tasks until you know how you react to it.
• Tadapox may cause dizziness, lightheadedness, or fainting; alcohol, hot weather, exercise, or fever may increase these effects. To prevent them, sit up or stand slowly, especially in the morning. Sit or lie down at the first sign of any of these effects.
• Do not drink large amounts of alcohol (eg, 5 drinks or more) while you take Tadapox. Doing so may increase your risk of dizziness, headache, fast heartbeat, and low blood pressure.
• Patients with heart problems who take Tadapox may be at increased risk for heart-related side effects, including heart attack or stroke. Symptoms of a heart attack may include chest, shoulder, neck, or jaw pain; numbness of an arm or leg; severe dizziness, headache, nausea, stomach pain, or vomiting; fainting; or vision changes. Symptoms of a stroke may include confusion; vision or speech changes; one-sided weakness; or fainting. Contact your doctor or seek medical attention right away if you experience these symptoms.
• Tadapox does not stop the spread of HIV or other sexually transmitted diseases (STDs) to others through sexual contact. Use barrier methods of birth control (eg, condoms) if you have HIV infection or an STD.
• Tadapox will not prevent pregnancy. If your partner may become pregnant and you wish to avoid pregnancy, be sure to use an effective form of birth control.
• Do not use other medicines or treatments for ED while you are taking Tadapox without first checking with your doctor.
• Use Tadapox with caution in the elderly; they may be more sensitive to its effects.
• Tadapox is not recommended for use in women, teenagers and children younger 18 years.

All medicines may cause side effects, but many people have no, or minor, side effects.

Check with your doctor if any of these most common side effects persist or become bothersome:

Headache; dizziness; drowsiness; flushing; mild back or muscle pain; stuffy or runny nose.

Most of symptoms that this drug has subside with time. In extremely rare cases, Tadapox shows severe reactions that can lead to conditions such as priapism, respiratory disorders and rashes with pus formation.