In one sentence, describe what the following article is about: You may be a good candidate for Viagra (sildenafil) if you are suffering from erectile dysfunction, or the inability to hold an erection long enough to engage in sexual activity. It's important to discuss the medication with your doctor to make sure the drug is a healthy choice for you. Inform your doctor if you're allergic to any drugs so that he or she can determine whether you may be allergic to Viagra. Let your doctor know what other medications you're taking, including herbal supplements. Nitroglycerin and other long-acting nitrates used to treat chest pain are contraindicated with Viagra, which can cause the blood pressure to drop to dangerously low levels and lead to a heart attack or stroke. These drugs, which are prescribed for blood pressure and prostate problems, can also cause the blood pressure to drop too low when they are mixed with Viagra.
Summary: Talk to your doctor. Don't take Viagra if you take nitrates. Don't take Viagra if you take alpha-blockers.

A huge part of looking great at your wedding is looking good in your wedding pictures. It's a photographers job to make sure you look fabulous. They know what you are looking for in your wedding photos and will give you instruction and feedback as they snap their photos. Good posture is flattering to your body and makes you look slimmer. It also gives you an air of confidence. Slouching in your wedding photos will make you look uncomfortable or unhappy, so even if you don't like getting your picture taken, make an effort to straighten up. Try to elongate your spine and push your shoulders back. Make sure to keep your chin up so that your face is pointed at the photographer. Make sure you are giving a big, natural smile. Remember how happy you are on this day and try to let that show in your face. Concentrate on making the smile go all the way to your eyes! Some people's eyes naturally squint when they smile. Try to keep your eyes open when you smile, because a lot of emotion is lost when your eyes aren't visible. Smile in a few different ways. Do a close-mouth smile, then an open mouth, and then experiment with the wideness of your smile. Don't get stuck in one pose. You want to make sure that you find a pose that is flattering and natural for you, and that might mean posing in a couple different ways. Start with a straight-on, traditional pose. Then angle one shoulder at the camera with one foot slightly in front of the other. Experiment with putting your hands on your hips. Changing poses should feel subtle and natural, so don't try to do any poses that feel strange or unlike you. This day is about the two of you becoming family, and you want that to show in your wedding photos. Put your arm around your spouse or give him or her a kiss for the camera. You can also look at your spouse and smile. That is a very sweet pose and it communicates how happy you are to start your new life with your new spouse. Do series of different shots that feature the important people in your life. Make sure that you get photographs of just you and your spouse. Other ideas for shots include you and your bridesmaids or groomsmen, a shot with both of your families, and a photo with friends. If you are hiring a professional photographer, he or she is paid to orchestrate these photographs. The photographer will direct the different shots so that your friends and family will know when they are needed.
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One-sentence summary -- Use a hired photographer. Stand up straight. Smile for the camera. Pose in a couple different ways. Interact with your spouse. Vary who is in the photographs.

Problem: Article: Tap the App Store app icon, which resembles a white "A" on a light-blue background. This option is in the lower-right corner of the screen. It's the grey text box with "App Store" in it at the top of the page. Type in vlc, then tap the blue Search button in the lower-right side of the keyboard. Scroll down until you find this heading next to VLC's orange traffic cone icon. It's to the right of the "VLC for Mobile" heading. If you've downloaded VLC before, you'll tap {"smallUrl":"https:\/\/www.wikihow.com\/images\/e\/ea\/Iphoneappstoredownloadbutton.png","bigUrl":"\/images\/thumb\/e\/ea\/Iphoneappstoredownloadbutton.png\/30px-Iphoneappstoredownloadbutton.png","smallWidth":460,"smallHeight":460,"bigWidth":"30","bigHeight":"30","licensing":"<div class="mw-parser-output"><p>I edited this screenshot of an iPhone icon.
<\/p><p>License: <a rel="nofollow" class="external text" href="http:\/\/en.wikipedia.org\/wiki\/Fair_use">Fair Use<\/a><br>
<\/p><\/div>"} to the right of this heading. Doing so will allow VLC to begin installing onto your iPhone. You can open VLC immediately after it downloads by tapping OPEN in the App Store.
Summary:
Open your iPhone's App Store. Tap Search. Tap the search bar. Search for VLC. Find the "VLC for Mobile" heading. Tap GET. Enter your Touch ID or Apple ID password when prompted.