Taking Viagra to enhance endurance is a method developed accidentally when researching cardiovascular disease medications, eventually leading to its use as a prescription drug for treating male erectile dysfunction (ED). In Hong Kong, a doctor’s prescription is required to purchase and use Viagra. It is commonly known by its brand name Viagra in Hong Kong and Mainland China, referred to colloquially as “偉哥” or “威而鋼” in Taiwan. Pfizer’s patent for Viagra has expired, allowing other manufacturers to produce similar medications legally.
Methods to Increase Endurance with Viagra
- It is generally recommended to take Viagra 30 minutes to 1 hour before sexual activity, with effects lasting 4 to 6 hours.
- Levitra (known as 乐威壯) is absorbed faster, and effects can be felt within 15 to 30 minutes.
- Cialis (known as 犀利士) provides longer-lasting effects, up to 36 hours.
Clinical practice varies depending on the patient’s condition. For individuals with chronic illnesses affecting sexual function, Cialis may be prescribed in lower, daily doses without the need to take it before each sexual encounter.
Side Effects of Taking Viagra
- Take Viagra approximately 1 hour before sexual activity, no more than once per day, and no more than 6 times per month.
- Do not use Viagra if you are taking medications containing “nitrates” (e.g., for heart disease) as it can lead to dangerously low blood pressure, potentially causing shock or death. Patients with heart conditions, high or low blood pressure, should exercise caution.
- If an erection lasts longer than 2 hours, seek medical attention immediately.
- Avoid driving within 3 hours of taking the medication due to possible temporary visual impairments.