Doctor insights on:
How Long Does It Take Vitamin B12 To Work
Take effect?: I'm not sure what you mean by 'take effect.' the only indication for vitamin B12 injection is for people with severe B12 deficiency or those who are unable to absorb B12 from their diet. That applies to very few people. If you're being given B12 injections for 'energy, ' you should be aware that's it's a commonly administered placebo. ...Read more
About 12 Hours: People how take vitamine B12 it work in about 12 hours, i think the same could be for b1. ...Read more
Several weeks: To several months depending on the degree of the deficit. ...Read more
Depends: It comes as a long acting form and a short acting form. If you take a short acting capsule on an empty stomach, it will work within 1-2 hours. If you cut off the end and squeeze the medicine under your tongue (not recommended), it will work in 1-2 minutes but can cause excessive fall in BP so can be dangerous. ...Read more
At least a few days: It can take up to 5 or more days for the medication to reach therapeutic effect. Sensitivity to the medication is based on genetic factors, as well as interaction with diet and other medications. Other newer anticoagulants may work within hours. ...Read moreSee 1 more doctor answer
Depends: There are many different kinds of anemia, each of which have their own causes. You need to figure out what kind of anemia you have and what needs to be done to treat it. It could be that a simply nutritional supplement (iron, b12, thiamine) will be enough. It could be a more chronic problem that has no quick fix. If you're anemic for any reason, you need to see your doc right away. ...Read moreSee 1 more doctor answer
lisinopril: Initial venodilation and weak arteriolar dilation begins with the first few doses. BP changes may take a week or so and changes beneficial to CHF begin to be see after 6 weeks. ...Read more
About an hour: After oral ingestion, should start being absorbed in about 45-60 min, with blood levels stabilizing within 90-120 hrs maximum. If an effect is not experienced by then may need to ramp up dosage, but usually 200 mg daily should work. However, if generic, may not get absorbed as well. And some need Nuvigil instead. ...Read more
12 to48 hours: It start working in 12 to 48 hours, but can take up to 3 days to work. ...Read more
Synthroid (thyroxine) medication: It will take about two weeks after starting medication to start feeling any difference. Around four weeks, the medication will reach its final level. Your doctor should check TSH and free T4 at 4-6 weeks after starting the medication. Your doctor may need to adjust your medication based on the labwork, either less or more dosage in synthroid (thyroxine). ...Read more
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