You may have heard that Kamagra Oral Jelly Australia is cheaper than the brand Viagra. While it's not a prescription drug, it is an effective alternative for men with erectile dysfunction. It contains sildenafil, the active ingredient in Viagra. While the brand Viagra is very effective, it can be quite expensive. Sildenafil should be taken on an empty stomach, while tadalafil may be taken with food. Neither of these drugs should be taken more than once a day. They are both prone to side effects, including back pain, nose congestion, and headache.