Viagra (sildenafil) has been shown to be effective in 67% of patients with erectile dysfunction versus 29% of those taking a placebo. of the popular treatment for erectile disorders increases with higher doses. Clinical data reported by the US Food and Drug Administration (FDA) found that 20 mg of Viagra improved sexual performance in 63% of patients, 50 mg improved performance in 74% and 100 mg in 82% of patients.
The FDA reports similar success rates for Levitra (vardenafil) at doses of 5 mg, 10 mg and 20 mg (65%, 75% and 80%, respectively). Cialis (tadalafil) was also more effective at higher doses (59% in the 20 mg group; 40% in the 10 mg group).
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Although everyone reacts differently to erectile dysfunction drugs, there are a few things you can do to increase the efficacy of your medication. Make sure you take your drug of choice according to the package insert or your doctor’s orders. Cialis, for example, takes up to 2 hours to be effective and therefore must be taken at the right time. The drug can last between 18 to 36 hours. But compared to Levitra or Viagra, Cialis can be taken alongside food.
Finding the right dose
It may take some time to find the dose that works for you. Your doctor will usually start you on a lower dose to monitor for side effects. If the lowest dose is not effective, speak to your doctor to increase it. If you notice any unexpected side effects, call your doctor. Do not increase your dose without speaking to a healthcare advisor.
Erectile dysfunction prescription drugs aren’t suitable for everyone. Men with certain medical conditions should always consult their doctor before taking Viagra and co. Drugs that are known to interfere with most erectile dysfunction medications, include nitrates, blood pressure medications, anti-fungal, and anti-viral drugs. Avoid taking prescription drugs for erectile dysfunction when drinking large amounts of alcohol.
- Hatzimouratidis, K, "Sildenafil in the treatment of erectile dysfunction: an overview of the clinical evidence.". in PubMed Central (PMC), , 2019, <https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2699643/#targetText=The%20efficacy%20of%20sildenafil%20in,ED%20is%20more%20than%20established.&targetText=In%20type%201%20diabetic%20patients,(Stuckey%20et%20al%202003).> [accessed 6 October 2019].
- FDA. Accessdata.fda.gov, , 2019, <https://www.accessdata.fda.gov/drugsatfda_docs/label/2014/20895s039s042lbl.pdf> [accessed 6 October 2019].
- EMA. Ema.europa.eu, , 2019, <https://www.ema.europa.eu/en/documents/scientific-discussion/cialis-epar-scientific-discussion_en.pdf> [accessed 6 October 2019].
- FDA. Accessdata.fda.gov, , 2019, <https://www.accessdata.fda.gov/drugsatfda_docs/label/2007/021400s010lbl.pdf> [accessed 6 October 2019].