Viagra is a prescription medication used to treat erectile dysfunction in men. Its active ingredient is sildenafil citrate, and it comes in different doses, such as viagra 100 mg tablets. Here are some warnings and precautions to keep in mind when taking Viagra 100 mg:

Pregnancy

Viagra 100 mg is not suitable for use in women.

Breastfeeding

Viagra 100 mg is not suitable for use in women.

Driving and using machines

Do not drive or operate any machines if you experience dizziness or blurred vision after taking Viagra 100 mg.

Alcohol

If you take Viagra 100 mg, don't drink alcohol because it could temporarily make it harder to get an erection.

Kidney

Viagra 100 mg should be used with caution in patients with kidney diseases. Therefore, consult your doctor before taking

Liver

Viagra 100 mg is not recommended for use in patients having severe liver diseases. It should be used with caution in patients with other minor liver problems. Therefore, consult your doctor before taking

Allergy             

Do not take Viagra 100 mg if you are allergic to sildenafil.

Lungs 

Viagra 100 mg should be used with caution in patients with pulmonary arterial hypertension. Therefore, consult your doctor before taking

Heart disease                      

Viagra 100 mg is not recommended for use in patients with severe heart diseases (such as any recent heart attack, stroke, or severe low blood pressure). It should be used with caution in patients with other heart diseases. Therefore, consult your doctor before taking

Others 

Viagra(100 mg) is not recommended for use if you:

• Have any type of a rare inherited eye diseases (such as retinitis pigmentosa)
• Previously had vision loss due to non-arteritic anterior ischaemic optic neuropathy (nerve damage caused due to lack of blood and oxygen supply to the eye)

Before taking Viagra 100 mg, inform your doctor if you:

• Have sickle cell anaemia (an inherited blood disorder charactrized by low RBC count)
• Have cancers of blood (leukaemia) or bone marrow (multiple myeloma)
• Have penile deformation
• Have Peyronie’s disease (development of fibrous scar tissue in the penis that causes painful erection)
• Have stomach ulcer or bleeding disorder such as haemophilia

Dosage for Viagra 100mg Tablet

Sildenafil citrate, which is what Viagra is made of, should be taken

Viagra 50 mg about an hour before sexual activity. However, the dosage may be adjusted based on individual response and tolerability, up to a maximum recommended dose of 100 mg per day.

It's crucial to take Viagra exactly as your doctor has prescribed and not go over the recommended dosage. It should not be taken more than once a day.

It is also important to note that Viagra should not be taken with certain medications, such as nitrates, or with grapefruit juice, as this can increase the risk of side effects. It is important to talk to a healthcare provider about all medications and supplements being taken before starting treatment with Viagra.

Overdose

• Symptoms of an overdose are headache, dizziness, indigestion, flushing, stuffy nose.

• If you experience any of the symptoms or think you have taken too much of Viagra 150 mg tablet, contact your doctor immediately or visit the nearest hospital.

Missed a Dose

• If you have missed taking any dose of Viagra 100 mg tablet, take it as soon as you remember.
• If it's time for your next dose, then skip the missed dose and continue with your regular dose
• schedule.
• Do not take a double dose of medicine to compensate for the missed one.

Contraindications of Viagra 100 MG

• If you are allergic to sildenafil or any other ingredients of Viagra 100 mg tablet.
• If you have a certain eye condition like retinitis pigmentosa.
• If you suffer from any heart problems like stroke or heart attack or any liver problems.
• If you have ever had a loss of vision.
• If you are taking certain medicines (nitrates) which can lead to a decrease in blood pressure.

If you are taking riociguat which is used in the treatment of arterial blood pressure.