Also tell your doctor if you or any of your family members have or have ever had an eye disease such as retinitis pigmentosa an inherited eye condition that causes loss of vision or if you have ever had sudden severe vision loss, especially if you were told that the vision loss was caused by a blockage of blood flow to the nerves that help you see. Remove the cap by pushing it down and twisting it counter-clockwise. This increased blood flow can cause an erection. When a man is sexually stimulated, his body’s normal response is to increase blood flow to his penis to produce an erection. Slowly pull back the plunger until the required dose. · The recommended dosage for Teva sildenafil is 50 mg, but if you are seeing minimal improvements of your symptoms at that level, consider talking with your doctor about increasing the dosage. The.  · Drugs and Supplements Sildenafil (Oral Route) Description and Brand Names Before Using Proper Use Precautions Side Effects Products and services Proper Use Drug information provided by: Merative, Micromedex ® Use sildenafil exactly as directed by your doctor. Do not use more of it and do not use it more often than your . The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is mg. Don’t take sildenafil (Viagra) more than once daily (at any dose).