VIAGRA can have side effects. Not all side effects reported for VIAGRA are included in this leaflet. Should your general health worsen or if you experience any untoward effects while taking VIAGRA, please consult your health care provider for advice.
If any of the following happens, stop taking VIAGRA and tell your doctor immediately or go to the casualty department at your nearest hospital:
• If you experience a prolonged and painful erection which lasts continuously for more than 4 hours.
• If you experience chest pains at the start of or during sexual intercourse.
• If you experience sudden wheeziness, difficulty in breathing or dizziness, swelling of the eyelids, face, lips or throat.
• If you experience a sudden decrease or loss of vision.
• Rash or itching.
These are all very serious side effects. If you have them, you may have had a serious allergic reaction to VIAGRA. You may need urgent medical attention or hospitalisation.
Tell your doctor if you notice any of the following:
Frequent side effects:
• Headache.
• Facial flushing.
• Hot flushes.
• Stuffy nose.
• Runny nose.
• Flu-like symptoms.
• Dizziness.
• Effects on vision (including colour tinge to vision, blurred vision).
• Pounding heartbeat (palpitations).
• Nausea.
• Indigestion.
Less frequent side effects:
• Respiratory tract infection.
• Infection.
• Fluid-filled sores on mouth or genitals.
• Infection of the throat.
• Urinary tract infection.
• Infection of the voice box.
• Sinusitis.
• Decreased red blood cells.
• Decreased white blood cells.
• Blood sugar levels that swing quickly from high to low.
• Too much sugar in the blood.
• Too much salt in the blood.
• Gout (swelling of joint usually of the big toe accompanied by severe pain and heat).
• Increased levels of uric acid in the blood.
• Low blood sugar.
• Inability to sleep.
• Depression.
• Abnormal dreams.
• Difficulty in achieving orgasm.
• Sleepiness.
• Disturbance to nervous system.
• Tingling.
• Numbness.
• Loss of muscle coordination or muscle weakness.
• Pain along the course of the nerves.
• Fainting.
• Motion sickness.
• Migraines.
• Tremor.
• Decreased reflexes.
• Eye pain.
• Sensitivity to light.
• Increased brightness of light.
• Appearance of light flashes.
• Inflammation of membrane of the eye.
• Swelling of the eye.
• Eye strain.
• Dry eyes.
• Double vision.
• Yellow or red tinge in vision.
• Abnormal sensation in the eye.
• Burning of the eye.
• Eye irritation.
• Cloudiness of vision.
• Ringing in the ears.
• Deafness.
• Ear pain.
• Increased heart rate.
• Severe pain in chest.
• Impairment in conduction between chambers.
• Heart failure.
• Heart disease.
• Low blood pressure.
• Shock.
• Sudden dizziness on standing.
• Nosebleed.
• Dry or swollen nasal passage.
• Increased cough.
• Increased phlegm.
• Gastric reflux.
• Vomiting.
• Stomach-ache.
• Dry mouth.
• Diarrhoea.
• Inflammation of the stomach and intestines.
• Inflammation of the gums.
• Bleeding of the rectum.
• Reduced sensitivity in the mouth.
• Inflammation of the tongue, food pipe, colon or mouth.
• Sweating.
• Skin ulcer.
• Skin reactions.
• Shedding of the skin.
• Skin sensitivity to light.
• Redness of skin.
• Muscle pain.
• Severe joint pain.
• Back pain.
• Inflammation around joints and tendons.
• Inflammation of joints.
• Tendon rupture.
• Joint disease.
• Bone pain.
• Inflammation of the bladder.
• Excessive urination at night.
• Urinary frequency.
• Loss of bladder control.
• Blood in urine.
• Increased erection.
• Abnormal ejaculation.
• Prostate (a gland in males situated near the bladder) disorders.
• Breast enlargement.
• Genital swelling.
• Feeling hot.
• Lack of energy and strength.
• Pain.
• Thirst.
• Chest pain.
• Irritability.
• Chills.
• Swelling.
• Swelling of the hands and feet.
• Increased heart rate.
• Abnormal heart or liver function tests.
• Accidental injury/fall.
Other side effects:
• Fits, fits recurrence.
• Prolonged erection.
• Bleeding in the eye.
• Pressure in the eye.
• Detachment of the liquid in the eye from the inner lining of the eye.
• Damage of the optic nerve associated with loss of vision or blindness.
• Bloodshot eyes.
• Temporary loss of vision.
• Heart attack.
• High blood pressure.
If you notice any side effects not mentioned in this leaflet, please inform your doctor or pharmacist.
Reporting of side effects
If you get side effects, talk to your doctor or pharmacist or nurse. You can also report side effects to SAHPRA via the “6.04 Adverse Drug Reaction Reporting Form”, found online under SAHPRA’s publications: https://www.sahpra.org.za/Publications/Index/8. By reporting side effects, you can help provide more information on the safety of VIAGRA.