Check with your doctor immediately if any of the following side effects occur: Less common burning feeling in the chest or stomach burning, crawling, itching, numbness, prickling, “pins and needles”, or tingling feelings cloudy or bloody urine. If too much is used, the chance of side effects is increased. Although not all of these side effects may occur, if they do occur they may need medical attention. Keep out of the reach of children. If you have an erection that lasts more than 4 hours, get medical help right away. However the dose is usually not more than 40 mg 3 times a day. Age greater than 50 years or Coronary artery disease or Crowded disc or low cup to disc ratio in the eye an eye disorder or Diabetes or Hyperlipidemia high fats in the blood or Hypertension high blood pressure or Non-arteritic anterior ischemic optic neuropathy or NAION serious eye condition , history of or Smoking—May increase the chance for a serious side effect in the eye called NAION.Rarely reported side effects include: an erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, get medical help right away. If it is not treated right away, priapism can permanently damage your penis. sudden vision loss . Answer 11 of Can one purchase Viagra over the counter in Saigon and at what price? Is there a generic equivalent to Viagra and at what price? Are there any other considerations? 1. Re: Viagra or Kamagra 14 years ago Save Dave, as you are thinking of taking your teddy bear to Vietnam (as mooted in your first post re ‘entertaining’ female companions in your hotel room) I would think that neither form of medical assistance is necessary for an encounter of the cuddly toy kind. Enough of this my lad, you have had your fun.