Cialis (talafil) is an orally ministered prescription medication used for erectile dysfunction (ED) and pulmonary arterial hypertension (PAH) to reduce the .Avoiding Grapefruit and Alcohol When taking generic Viagra, it’s best to avoid consuming grapefruit or grapefruit juice as they can interfere with how your body metabolizes the medication. I have also taken sereis of drugs from viagra to levitra and all these advertised natural male enhancer and none has ever worked. These symptoms usually subside on their own and are nothing to be overly concerned about. It’s important to note that taking generic Viagra alone won’t automatically give you an instant erection; sexual stimulation is still key here. Did you know that millions of men worldwide struggle with erectile dysfunction ED? Don’t take them together. These may include dizziness, muscle aches or pains, back pain, or priapism a prolonged erection lasting more than four hours.Although rare, Viagra (sildenafil), Cialis (talafil) and Levitra (vardenafil) can cause muscle pain and unusual skin sensations or paresthesia. In clinical studies, Viagra . Sildenafil: The Key Ingredient. Sildenafil is the active ingredient in generic Viagra. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors. . There are a few different options: Viagra, Cialis, Levitra, and more. (). A comparison of the available phosphodiesterase-5 inhibitors in the treatment of .Blood disorders: Conditions like sickle cell anemia or leukemia require careful monitoring when using generic Viagra due to its impact on blood flow. Dosage The recommended dose for Viagra is 50 mg, and the physician may adjust this dose to mg or 25 mg, depending on the patient. Wright PJ. With its track record of success, generic Viagra has become a popular choice among men experiencing difficulties with sexual performance. Related Content. Adjustments Based on Individual Response Depending on how your body responds to the medication, your healthcare provider may adjust the dosage.