Nitroglycerin gels applied to the penis can range in strength from % to %. These doses are smaller than the nitroglycerin paste or gel applied to the chest for chest pain, .The FDA has now approved two medications. Can I buy any other ED medications over the counter? Typically this takes the form of a tick box medical questionnaire, which is then reviewed by the pharmacist prior to supply. Given the success of drugs to treat erectile dysfunction, such as sildenafil Viagra , tadalafil Cialis and vardenafil Levitra, Staxyn , drug companies have sought a similar drug for women. ED can sometimes signal an underlying medical problem, like heart disease or diabetes , that needs to be treated separately. However, if you’d feel more comfortable talking with a healthcare provider virtually rather than in person, you can consider requesting an online ED prescription instead.Both Viagra and Viagra Connect contain the same active ingredient: Sildenafil. However, Viagra Connect is only available over the counter in the licensed strength of 50mg. In order to purchase Viagra Connect over the counter, you will be required to fill out a medical questionnaire which will be reviewed and authorised by the . Dosage. The dose of Cialis you need will depend on whether you’re taking it daily or as needed. Daily doses are often between and 5 milligrams (mg). The as-needed dose is usually 10 mg but can range from 5–20 mg. The typicaldose of Viagra is 50 mg. However, the dosage can range from 25– mg. Still, if your doctor says it’s okay for you to use and you end up paying out-of-pocket, you can still get the generic for a lot less than Viagra. According to price-comparison site In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO. Talk to your health care provider for more information about whether this might be an option for you. Which Works Faster? Nitric oxide is a substance that causes blood vessels to relax. Sexual problems may be due to difficulties with arousal, a lack of desire or both.