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Viagra 100mg

Buy Viagra Online 

Viagra (Sildenafil) is a common medicine used to stimulate erections in men who have erectile dysfunction (ED). People also buy Viagra online to treat pulmonary arterial hypertension (a condition of high blood pressure that affects the heart and lungs). Viagra is a very popular brand name medication for treating erectile dysfunction.

There can be a number of factors that influence how long Viagra takes to start working. Generally, the medication takes about 30 minutes to begin working with noticeable effects.

People on nitrates such as glycerin trinitrate (nitroglycerin), as concomitant use of these two results in a severe drop in the blood pressure.

The medication works by blocking PDE-5 (phosphodiesterase) enzymes to slow down cGMP breakdown, regulating the blood flow in the penis. However, Viagra needs sexual arousal to work. It may also result in the dilation of the lungs’ blood vessels.

History of Viagra

Pfizer Pharmaceuticals initially discovered sildenafil in 1989 while their experts were looking for a treatment for chest pain related to the heart. It got approved for medical use in the United States in 1998. In the year 2017, Viagra was the 217th most prescribed medication in the country, with more than 2 million prescriptions written that year. In the same year, the generic version of the medicine came on the market. Now, people can buy Viagra online in both brand name and generic versions.

Dosage FAQS

What is a safe dose of Viagra? 

Buy Viagra online after knowing the safe dose for the medication. The standard dosing information for Viagra is:

Dosages Information

The suggested dose is 50 mg taken for most patients, varying around 1 hour before sexual activity. In any case, Viagra might be taken somewhere in the range of 30 minutes to 4 hours before sexual movement. The most significant suggested dosing recurrence is once every day.

In light of viability and lenience, the dose might be increased to the greatest suggested dose of 100 mg or diminished to 25 mg.

Use With Food

Viagra might be taken with or without food.

Dosages Adjustments In Specific Situations

Viagra was to potentiate the hypotensive impacts of nitrates and its organization in patients who utilize nitric oxide contributors; for example, natural nitrates or natural nitrates in any structure is in this way contraindicated.

At the point when Viagra is co-regulated with an alpha-blocker, patients should be steady on alpha-blocker treatment before starting Viagra treatment, and Viagra ought to get started at 25 mg.

How to get the most out of the treatment with Viagra? 

Along with Viagra, do the following lifestyle and home-based measures to get the most out of your medication:

  • Quit smoking
  • Lose those extra pounds
  • Exercise daily
  • Do more physical activities
  • Get treatment for drugs or alcohol problems
  • Work through relationship issues

How is the chemical structure of Viagra? 

The preparation steps for sildenafil (Viagra) synthesis are:

  1. Methylation of propyl pyrazole carboxylic acid ethyl ester with dimethyl sulfate (hot)
  2. Hydrolysis with sodium aqueous sodium hydroxide to free acid
  3. Nitration with fuming nitric acid
  4. Carboxamide formation with thionyl chloride (refluxing)
  5. Reduction of nitro to amino
  6. Acylation with ethoxybenzoyl chloride
  7. Cyclization
  8. Sulfonation (chlorosulfonyl derivative)
  9. Condensation with methyl piperazine

Side Effects of Viagra

The most common adverse effects of Viagra in clinical trials include:

  • Flushing
  • Headache
  • Indigestion
  • Impaired vision
  • Nasal congestion
  • Blurred vision
  • Photophobia

Some Viagra users reported seeing everything tinted blue, a condition known as cyanopsia. Others reported blurriness and loss of peripheral vision.