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Author: Admin | 2025-04-28
May adjust this dose to 20 mg if 10 mg is insufficient. A lower dose of 5 mg is available for men who take other medicines or have conditions that may decrease the body's ability to use the drug. Levitra is also available in a 2.5 mg dose. None of these PDE-5 inhibitors should be used more than once a day. Side effects Most common side effects: Viagra: headache, epistaxis, flushing, indigestion, dizziness, nasal congestion, abnormal vision Levitra: headache, flushing, indigestion, nausea, dizziness, nasal congestion Cialis: headache, indigestion, back pain PDE-5 inhibitors are generally well tolerated. Side effects include headache, flushing, dyspepsia, and nasal congestion. Visual abnormalities are encountered with Viagra, but are less likely with Levitra and unlikely with Cialis. Flushing and dyspepsia that are associated with Viagra and Levitra are less common with Cialis. Back pain and muscle aches (myalgia) may occur with Cialis, but are unusual with either Viagra or Levitra. Side effects of Cialis tend to last longer, but are less marked than with the other drugs. Precautions and contraindications All PDE-5 inhibitors are absolutely contraindicated in persons who take organic nitrates, because they induce vasodilation. The FDA no longer considers concomitant use of alpha-blockers a contraindication to use of PDE-5 inhibitors. However, persons on alpha-blockers must be on a stable dose of alpha-blocker prior to using a PDE-5 inhibitor. Since both Viagra and Levitra have moderate vasodilatory and hypotensive effects, they should not be given in the presence of marked arterial or orthostatic hypotension, and
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