Other blood tests: Evaluation for hemochromatosis, lupus, scleroderma, zinc deficiency, sickle cell anemia, cancers (leukemia, colon cancer) are some of the other potential tests that may be performed based on each individual's history and symptoms. This section needs additional citations for verification. (May 2010) buy viagra online without prescription Phosphodiesterase type 5 inhibitors - The cyclic nucleotide phosphodiesterases constitute a group of enzymes that catalyze the hydrolysis of the cyclic nucleotides cyclic AMP and cyclic GMP. They exist in different molecular forms and are unevenly distributed throughout the body. What are the side effects of vardenafil (Levitra)? Vardenafil is generally well tolerated with only mild side effects. These side effects include headache, flushing, nasal congestion, dyspepsia, body aches, dizziness, nausea, and increased blood levels of the muscle enzyme creatine kinase. What about psychological therapy? Experts often treat psychologically based impotence using techniques that decrease anxiety associated with intercourse. The patient's partner can help apply the techniques, which include gradual development of intimacy and stimulation. Such techniques also can help relieve anxiety when physical impotence is being treated. If these simple behavioral methods at home are ineffective, referral to a sex counselor may be advised. The pressure from the expanding penis compresses the veins (blood vessels that drain the blood out of the penis) in the tunica albuginea, helping to trap the blood in the corpora cavernosa, thereby sustaining erection. Erection is reversed when cGMP levels in the corpora cavernosa fall, causing the smooth muscles of the corpora cavernosa to contract, stopping the inflow of blood and opening veins that drain blood away from the penis. The levels of the cGMP in the corpora cavernosa fall because it is destroyed by an enzyme called phosphodiesterase type 5 (PDE5). online viagra scams buy viagra q online cialis buy cialis cialis dosage online a href buy cialis online Erectile dysfunction, heart disease and other vascular diseases: Certain risk factors increase the risk of more atheroma forming which can make atheroma-related conditions worse. These are discussed in more detail in another leaflet called 'Preventing Cardiovascular Diseases'. Briefly, risk factors that can be modified and may help to prevent atheroma-related conditions from getting worse are: Smoking. Smoking is one of the biggest risk factors for developing an atheroma-related condition. Smoking roughly doubles your chance of developing ED. Young smokers may not be aware that they have a much greater risk of developing ED by middle age compared with nonsmokers. If you smoke, make every effort to stop. High blood pressure. Make sure your blood pressure is checked at least once a year. If it is high, it can be treated. If you are overweight, losing some weight is advised. A high cholesterol. This can be treated if it is high. Inactivity. We should all aim to do some moderate physical activity on most days of the week for at least 30 minutes. For example, brisk walking, swimming, cycling, dancing, gardening, etc. Diet. Aim to eat a healthy diet. Details in a separate leaflet called 'Healthy Eating'. Alcohol excess. Diabetes. If you have diabetes, good control of the blood sugar level and blood pressure can help to minimise the impact of diabetes on the blood vessels.