The active ingredient in Kamagra Oral Jelly Australia is Sildenafil Citrate, which has been used for years to treat ED in men. It works by inhibiting the action of phosphodiesterase type 5 (PDE 5) enzymes, which causes the blood vessels in the penis to relax. This increases blood flow to the area and helps to maintain an erection during sexual activity. This medicine is not recommended for females or people who are taking nitrate-based medications (often prescribed for chest pain or angina). The medication should be taken about an hour before sexual intercourse. It should not be taken with alcohol or high-fat meals, as this can reduce the effectiveness of the drug.