Do not take sildenafil - Viagra if you are taking this drug. 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 causing death .
If you have been using nitroglycerin regularly for few weeks or more, do not suddenly stop using it . Stopping suddenly may bring on attacks of angina. Check with your family doctor for the best way to reduce gradually the amount you are using before stopping completely.
Dizziness, lightheadedness, or faintness may occur , especially when you get up quickly from a lying or sitting position. Getting up slowly may help. If you feel dizzy, sit or lie down.
The dizziness, lightheadedness, or fainting is also more likely to occur if you drink alcohol, stand for long periods of time, exercise, or if the weather is hot While you are taking this drug, be careful to limit the amount of alcohol you drink. Always use extra care during exercise or hot weather or if you must stand for long periods of time .
After using a dose of this drug you may get a headache that lasts for a short time. This is a common side effect , which must become less noticeable after you have using the drug for a while. If this effect continues, or if the headaches are severe, check with your family doctor.