Viagra is a brand-name drug that is commonly used to treat erectile dysfunction (ED), a medical condition that results in inability to get or keep an erection. The generic name of the main drug in Viagra is sildenafil. The drug works by disrupting the phosphodiesterase-5 enzyme, resulting in the expansion of the blood vessel walls in the penis and increased blood flow as a result. This results in improved erections and sexual performance.

Viagra is available in South africa at a price of roughly .20 for a packet of four pills. This is due, in part, to the fact that the medication is subsidized by the Pharmaceutical Benefits Scheme. Viagra comes in three different potencies, 25mg, 50mg and 100mg. Your doctor will prescribe the correct potency for you, considering various factors such as your health, age, and degree of sexual dysfunction. Since it is a schedule four drug in South africa, Viagra is only available to patients with a prescription from a licensed physician.

As Viagra is one of the most frequently generic medicines in the world, patients taking Viagra should take precautions when purchasing it so as to ensure that they are taking a genuine version of the drug. The medication can be purchased through online auction sites, internet pharmacies and brick and mortar locations. Many of these online locations sell counterfeit Viagra. There are several risks associated with taking counterfeit Viagra. generic tablets can contain too much of not enough Viagra, resulting in ineffectiveness or harm to your health. Some counterfeit Viagra contain toxic ingredients to mimic the true-blue color of Viagra pills. Counterfeit drugs have also been found to contain illegal drugs such as amphetamines, dangerous antibiotics and other harmful drugs.

In order to ensure that you are not purchasing counterfeit Viagra, you should obtain a prescription from your doctor, and have it filled by a trusted pharmacist in-store. For patients who must rely on having their prescription filled by other means (such as over the internet), there are some precautions that can be taken to ensure that they are receiving genuine Viagra. Viagra tablets should feel smooth to the touch and have a stamped Viagra brand name that is clear and free from smudging. Furthermore, the pills should have a consistent uniform blue color and be free from color variation. Finally, Viagra is supplied only as solid tablets for oral consumption. If you find soft tablets, gel tablets or chewable tablets, these are categorically counterfeit and should be avoided.

Precautions: side effects

Some of the most common side effects that patients experience after taking Viagra include rashes, diarrhea and an increased susceptibility to urinary tract infections (UTIs). A less common side effect from taking Viagra is abnormal vision, specifically onset of a condition called cyanopsia. This is characterized by blurred vision, a sensitivity to light, and/or a blue-green tinge to the patient’s vision. Higher doses of Viagra increase the chance of a patient experiencing abnormal vision.

Additional possible side effects include headaches, indigestion, back pain, muscle aches, flushed skin and stuffy or runny noses. You should avoid Viagra if you have heart or blood vessel problems, a history of heart attacks or strokes, high or low blood pressure, liver problems, penile deformation or vision problems. When taking Viagra, you should avoid alcohol and grapefruit juice, as these substances have been found to counteract the drug. Viagra should not be taken by anyone who is currently taking nitrates for chest pain, as taking the drug has been shown to increase the effects of these medications and potentially result in an unsafe drop in blood pressure.