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  2. Your ED Pill Guide: Everything You Need to Know Before ... - AOL

    www.aol.com/ed-pill-guide-everything-know...

    Some of the most common side effects of ED meds include headaches, dizziness, upset stomach, back pain and nasal congestion. A healthcare provider can help you determine which ED medication and ...

  3. 4 Common ED Pills: Weighing the Pros & Cons of Each - AOL

    www.aol.com/4-common-ed-pills-weighing-141800609...

    The Best ED Medication for Men: Pros & Cons of Top ED Pills. Over the last 25 years, (ED) medications like Viagra and Cialis have become common fixtures in bedrooms around the world.

  4. Erectile dysfunction - Wikipedia

    en.wikipedia.org/wiki/Erectile_dysfunction

    Erectile dysfunction (ED), also referred to as impotence, is a form of sexual dysfunction in males characterized by the persistent or recurring inability to achieve or maintain a penile erection with sufficient rigidity and duration for satisfactory sexual activity.

  5. Prescription drug - Wikipedia

    en.wikipedia.org/wiki/Prescription_drug

    The Harvard Medical School Family Health Guide notes that, with rare exceptions, "it's true the effectiveness of a drug may decrease over time, but much of the original potency still remains even a decade after the expiration date". [24] The expiration date is the final day that the manufacturer guarantees the full potency and safety of a ...

  6. Vardenafil - Wikipedia

    en.wikipedia.org/wiki/Vardenafil

    Vardenafil, sold under the brand name Levitra among others, is a medication that is used for treating erectile dysfunction. [ 1 ] [ 2 ] It is a PDE5 inhibitor . [ 1 ] It is taken by mouth .

  7. What Is the Safest ED Medication? - AOL

    www.aol.com/safest-ed-medication-105700669.html

    Safety is an essential factor to consider before using any type of medication, and treatments for ED are no exception. Luckily, ED is a treatable issue with a number of well-known options.

  8. Effective half-life - Wikipedia

    en.wikipedia.org/wiki/Effective_half-life

    With the decay constant it is possible to calculate the effective half-life using the formula: t 1 / 2 = ln ⁡ ( 2 ) λ e {\displaystyle t_{1/2}={\frac {\ln(2)}{\lambda _{e}}}} The biological decay constant is often approximated as it is more difficult to accurately determine than the physical decay constant.

  9. How to Take Viagra for Best Results - AOL

    www.aol.com/viagra-best-results-105700318.html

    Viagra side effects may affect your ability to perform, though most are mild and temporary. All (ED) medications work best when you’re maintaining a healthy lifestyle. That’s the 30-thousand ...