Can I use out of date sildenafil?
Like most medications, Viagra can become less effective over time and expire if it's left unused for too long. Take note of the expiration date printed on your Viagra or generic sildenafil and aim to use the medication as prescribed before it expires. If your Viagra has expired, do not use it.
Viagra pills may still work for years after they're first made. But the reduction in chemical activity means that it won't work as well. Expired medications can also grow infectious mold or bacteria. As a rule of thumb, Viagra and other medications have a shelf life of about 2 years.
But serious side effects can also occur—these include chest pain, erections that last longer than four hours, shortness of breath, and vision changes. Once your Viagra is past its expiration date, it's difficult to know your likelihood of developing side effects, even if you have taken it before.
Sildenafil usually lasts for 4-6 hours at full potency. You'll continue to get some effect while there's some in your bloodstream, though, so it can still produce results past that point. It all depends on your health, age, dosage, and sexual activity.
This medicine usually begins to work for erectile dysfunction within 30 minutes after taking it. It continues to work for up to 4 hours, although its action is usually less after 2 hours.
What they found from the study is 90% of more than 100 drugs, both prescription and over-the-counter, were perfectly good to use even 15 years after the expiration date. So, the expiration date doesn't really indicate a point at which the medication is no longer effective or has become unsafe to use.
Dosage and strength for erectile dysfunction
Sildenafil tablets for erectile dysfunction come in different strengths ranging from 25mg to 100mg. The usual dose is 50mg, when you need it. Do not take it more than once a day. The dose can be increased to 100mg or decreased to 25mg depending on its effect.
Minor differences in packaging aside, brand name Viagra and its generic counterpart sildenafil are exactly the same medication. If you have erectile dysfunction, both medications should produce noticeable improvements in your erections and sexual performance. The key difference, as we mentioned above, is price.
Does Viagra help you keep an erection after ejaculating? Yes, Viagra may help you keep an erection, even after you ejaculate. But if you have an erection that lasts longer than 4 hours, see a doctor right away. This could be a medical emergency, and it can cause damage to your penis.
- Headaches. Make sure you rest and drink plenty of fluids. ...
- Feeling sick (nausea) It may help if you avoid rich or spicy food. ...
- Flushing including hot flushes. Try cutting down on coffee, tea and alcohol. ...
- Indigestion. ...
- Stuffy nose. ...
- Feeling dizzy.
Is sildenafil 50mg better than 100mg?
There is not a great deal of difference between Sildenafil 100mg and 50mg, although in clinical trials, the higher dosage was seen to be 82% effective, as opposed to 74% effective. The effects of Sildenafil 100mg do not last longer than the 50mg dosage, but they tend to be stronger.
Expired medical products can be less effective or risky due to a change in chemical composition or a decrease in strength. Certain expired medications are at risk of bacterial growth and sub-potent antibiotics can fail to treat infections, leading to more serious illnesses and antibiotic resistance.
The U.S. Food and Drug Administration (FDA) recommends never taking drugs beyond their expiration date as it is risky with many unknown variables. For example, how your drug is stored before you receive it, chemical make-up, and original manufacturing date can all affect potency of a drug.