• Dizziness or lightheadedness, especially when getting up from a lying or sitting position
• Fast pulse
• Flushing of face and neck
• Nausea or vomiting
• Restlessness
• Sore, reddened skin
• Blurred vision
• Dryness of mouth
• Headache (severe or prolonged)

If you have any problems that you feel are medication-related, please consult your healthcare provider.

Signs and symptoms of overdose (in the order in which they may occur)

• Bluish-colored lips, fingernails, or palms of hands
• Dizziness (extreme) or fainting
• Feeling of extreme pressure in head
• Shortness of breath
• Unusual tiredness or weakness
• Weak and fast heartbeat
• Fever
• Convulsions (seizures)

If you even suspect that you may have overdosed, please contact you provider immediately.

Make sure you have thoroughly discussed your medical history with your provider.

Do not take sildenafil (e.g., Viagra) if you are taking this medicine. When sildenafil is taken with nitrates, the combination can lower blood pressure and cause dizziness, lightheadedness, or fainting. In some case, sildenafil taken with nitrates has caused death.

If you have been using nitrates regularly for several weeks or more, do not suddenly stop using it. Stopping suddenly may bring on attacks of angina. Check with your provider for the best way to gradually reduce the amount you are using before stopping completely.

• Tell your provider if you are pregnant, breastfeeding or have liver disease.
• Avoid alcohol consumption.
• These medicines may make you dizzy.
• Avoid driving or using dangerous machinery.
• Tell your dentist that you are on this medication.