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Uncommon (0.1% to 1%): Penile hemorrhage, hematospermiaProduct Type HUMAN PRESCRIPTION DRUG LABEL Item Code (Source) NDC:0173-0828Do not change your dose of Levitra without talking to your doctor. Your doctor may lower your dose or raise your dose, depending on how your body reacts to Levitra.

Hepatic impairment (erectile dysfunction) viagra overnight Usual Adult Dose for Erectile Dysfunction:blood vessel problemsTadalafil 5 mg - Prior to initiating treatment with tadalafil for benign prostatic hyperplasia patients should be examined to rule out the presence of carcinoma of the prostate and carefully assessed for cardiovascular conditions (see section 4.3).

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Right now, Lieberman’s cards only detect if an ingredient is present or absent. Her next step is to design cards that detect if the drug contains some, but not enough, active ingredient. She also wants to make the cards cheaper—they now cost about 45 cents—and easier to read. venlafaxine (Effexor)

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Penile erection is a hemodynamic process initiated by the relaxation of smooth muscle in the corpus cavernosum and its associated arterioles. During sexual stimulation, nitric oxide is released from nerve endings and endothelial cells in the corpus cavernosum. Nitric oxide activates the enzyme guanylate cyclase resulting in increased synthesis of cyclic guanosine monophosphate (cGMP) in the smooth muscle cells of the corpus cavernosum. The cGMP in turn triggers smooth muscle relaxation, allowing increased blood flow into the penis, resulting in erection. The tissue concentration of cGMP is regulated by both the rates of synthesis and degradation via phosphodiesterases (PDEs). The most abundant PDE in the human corpus cavernosum is the cGMP-specific phosphodiesterase type 5 (PDE5); therefore, the inhibition of PDE5 enhances erectile function by increasing the amount of cGMP. Because sexual stimulation is required to initiate the local release of nitric oxide, the inhibition of PDE5 has no effect in the absence of sexual stimulation.

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