In an effort to provide some answers to your lingering questions, this guide will explain how to take sildenafil for the best results, a typical starting dosage, and potential side effects to consider. But remember that you should always follow your sildenafil 25 mg tablets provider’s instructions for taking sildenafil—or any medication, for that matter. Sildenafil belongs to a class of drugs known as PDE5 inhibitors. These medications block the PDE5 enzyme, resulting in the widening of your blood vessels to promote blood flow to the penis. This increased blood flow results in an erection. However, sildenafil doesn’t affect your libido. You still need to be aroused to get and maintain an erection long enough to yield satisfying sex. Healthcare providers can prescribe sildenafil tablets in different doses. A typical starting dose of sildenafil is 50 milligrams, which you’d take 30 minutes to four hours before sexual activity.
It is not known if the hearing loss was caused by the medication. If you experience a sudden loss of hearing, sometimes with ringing in the ears or dizziness, while you are taking sildenafil, call your doctor immediately. If you are taking sildenafil (Viagra) for erectile dysfunction, do not take any more doses of sildenafil (Viagra) or similar medications such as tadalafil (Cialis) or vardenafil (Levitra) until you talk to your doctor. If you are taking sildenafil (Liqrev, Revatio) for PAH, do not stop taking your medication until you talk to your doctor. Call your doctor if you have any unusual problems while you are taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online ( or by phone (1-800-332-1088). Keep this medication in the container it came in, tightly closed, and out of reach of children. Store the tablets at room temperature and away from excess heat and moisture (not in the bathroom). Store the suspension at room temperature or in a refrigerator, but do not freeze it. Dispose of any unused suspension after 60 days. Your provider may adjust your dosage depending on your needs and how you respond to the medication. It’s also possible you may get a prescription in doses that are multiples of 20 milligrams, including 20 milligrams, 40 milligrams, 60 milligrams, and 80 milligrams. In these cases, your sildenafil tablets would actually be the generic form of Revatio®, a medication that has the ingredient sildenafil, like Viagra, but is FDA-approved for pulmonary arterial hypertension (although it can be prescribed off-label for ED). Be sure to talk through all options with your healthcare provider. And, as is the case with taking any medication, following a professional’s medical advice is crucial.
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Unlike some other ED meds, you don’t take sildenafil every day. Sildenafil is an as-needed medication that should be taken at least about 30 minutes to an hour before sexual activity, and its effects should last up to four hours. You should never take more than one dose per day. You may be prescribed sildenafil or Viagra if you struggle with the following symptoms: Getting erections that aren't as firm as you'd like them to be Getting erections that aren't as firm as you'd like them to be Some medications can upset your stomach if you don’t take them with food. You can take this ED medication with or without food. However, high-fat meals can impact the absorption of sildenafil, leading to lower peak plasma levels of the medication, which can translate to lower efficacy. Grapefruit juice can also interfere with how the body processes sildenafil, leading to more side effects. So, if you’re a half-grapefruit in the a.m.
Sildenafil increases the blood white sildenafil tablets pressure within the lung arteries. It is often prescribed for the treatment of pulmonary hypertension. Pulmonary hypertension is abnormally high blood pressure within the lung arteries. This causes the right side of the heart to work too hard. Sildenafil relaxes the smooth muscle around the small blood vessels within the lungs, which decreases the heart's workload.
This medication works to improve overall quality of life, tolerance to exercise, and energy levels of animals suffering from pulmonary hypertension. The most frequently reported adverse reactions include: Drug interactions can occur when Sildenafil is administered with rifampin, phenobarbital, itraconazole, ketoconazole, clarithromycin, erythromycin, and cimetidine. Do not administer with drugs that can lower blood pressure, including hypotensive drugs, amlodipine, alpha-adrenergic blockers (including phenothiazines, phenoxybenzamine, and phentolamine), nitroprusside sodium, and nitrates. Only administer this medication to the animal it was prescribed to treat. The most frequently reported adverse reactions include: Sildenafil, 20 mg Tablet overdose: What to do? kind of guy, mention that to your healthcare provider before filling a sildenafil prescription. Keep sildenafil out of the reach of children and pets, and store the medication at room temperature between 68°F to 77°F (20°C to 25°C).
Keep a written list of all of the prescription and nonprescription (over-the-counter) medicines, vitamins, minerals, and dietary supplements you are taking. Bring this list with you each time you visit a doctor or if you are admitted to the hospital. You should carry the list with you in case of emergencies. We'll collect your vet's information at checkout to verify the prescription. Click on image to open expanded view Item No.
Usually shipped in 1-3 business days. $0.21 AutoShip & Save up to 30% We'll collect your vet's information at checkout to verify the prescription. "Sildenafil is available with a veterinarian prescription. It is often prescribed to treat lung and heart problems, including pulmonary hypertension. Sildenafil is a prescription drug that is regularly prescribed by veterinarians to treat heart and lung problems which include pulmonary hypertension. You should always sildenafil chewable tablets follow your doctor’s instructions regarding sildenafil dosing, but your total daily dosage should never exceed 100 milligrams. Even if you’re not getting results from a 100-milligram dose of sildenafil, don’t try to take more.
If sildenafil isn’t helping with your lackluster erections, there are a few possible reasons. Another kind of treatment altogether (like therapy for psychological ED) Another kind of treatment altogether (like therapy for psychological ED) Addressing underlying health conditions that can contribute to ED Addressing underlying health conditions that can contribute to ED Additionally, taking sildenafil too early (we’re talking more than a few hours before having sex) won’t produce the effects you’re looking for. That means you have to do a bit of sex planning when taking sildenafil. But you might be surprised at how sexy the anticipation can be—for you and your partner. Spend that time exploring new foreplay ideas or sharing your sexual fantasies. Avoid taking sildenafil if it’s expired.
According to the FDA, you should skip taking any expired meds and safely dispose of them for the following reasons: Their chemical composition could be altered, making them unsafe to consume.
| Use Case | Description | Typical Dosage | Notes |
|---|---|---|---|
| Treatment of Erectile Dysfunction | Improves blood flow to the penis | 20 mg as needed | Taken 30-60 minutes before sexual activity |
| Pulmonary Hypertension | To reduce blood pressure in lungs | 20 mg thrice daily | Prescribed by doctor |
| Off-label Uses | Potential treatment for other conditions | Varies | Under medical supervision |
Their chemical composition could be altered, making them unsafe to consume. How can you tell if your medications are expired? Check the label for a date, likely next to the abbreviation “Exp.” Want more tips on how to get the most out of sildenafil? Read our guide on how to use Viagra for best results. It doesn’t really matter if you forget to take sildenafil because it’s designed for you to take it as you need it. But be careful about accidentally doubling up on doses. Missing a dose before sex is no big deal, though doing so may impact the quality of your erection. However, forgetting you already took sildenafil and taking a subsequent dose within 24 hours can lead to complications, particularly if you go over 100 milligrams total. You should be aware of the potential side effects when taking any new drug. The most common side effects of sildenafil include: Most of these mild side effects will go away on their own as your body adapts to taking sildenafil.
Keep all medication out of sight and reach of children as many containers are not child-resistant. Place the medication in a safe location – one that is up and away and out of their sight and reach. Dispose of unneeded medications in a way so that pets, children, and other people cannot take them. Do not flush this medication down the toilet. Talk to your pharmacist about take-back programs in your community.
Visit the FDA's Safe Disposal of Medicines website for more information. In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911. Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription. But sildenafil also comes with some more rare but potentially serious side effects like: Sudden loss of vision (potentially a sign of non-arteritic anterior ischemic optic neuropathy or NAION) Sudden loss of vision (potentially a sign of non-arteritic anterior ischemic optic neuropathy or NAION) Priapism (a painful erection lasting longer than four hours) Priapism (a painful erection lasting longer than four hours) If you experience any of these symptoms after taking sildenafil, seek immediate medical attention.
What to know before using Sildenafil, 20 mg Tablet Drug interactions can occur when Sildenafil is administered with rifampin, phenobarbital, itraconazole, ketoconazole, clarithromycin, erythromycin, and cimetidine. If your healthcare provider just prescribed sildenafil citrate (generic Viagra®) to treat your erectile dysfunction (ED) symptoms, you’re probably excited to get your mojo back. But it’s also understandable if your head is swimming with questions. Like other PDE5 inhibitors, or phosphodiesterase type 5 inhibitors, sildenafil is a safe treatment for ED, if used as directed. It’s been Food and Drug Administration (FDA)-approved for this use since 1998, after all.