HealthCareMagic is now Ask A Doctor - 24x7 | https://www.askadoctor24x7.com

Get your health question answered instantly from our pool of 18000+ doctors from over 80 specialties
159 Doctors Online

By proceeding, I accept the Terms and Conditions

Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

HCM Blog Instant Access to Doctors
HCM BlogQuestions Answered
HCM Blog Satisfaction

What Is The Right Method To Buy Medicines As Prescribed By The Doctor?

What is the difference in CR & ER. generic I have been taking the ER and feel like zombie. The Pharmacist tell me there isno difference. I habe been taking th deep rd & small white Az afeel like zombie. Now I understand its because f of the different drug company. I remember receiving th pink ambein w/o this problem how can I make sure I get the right drug by the right mfg.
Tue, 5 Apr 2016
Report Abuse
Addiction Medicine Specialist,  's  Response
There certainly is not a RELIABLE difference. CR and ER are used interchangeably to indicate a medication that is put together to release drug slowly over time. About the same amount is packed in and is released in various brands of the same drug. There is not FDA (nor any other that I know of) standard for how fast a drug is released. It would vary so much between different people that it is basically impossible to make a rule for it.
If you get generics you will get different packages each time. If you get the brand it will be reliably made the same way, but it will be the most expensive.
I find this answer helpful
Note: For further follow up on related General & Family Physician Click here.
Disclaimer: These answers are for your information only and not intended to replace your relationship with your treating physician.
This is a short, free answer. For a more detailed, immediate answer, try our premium service [Sample answer]
Share on
 
Loading Online Doctors....
What Is The Right Method To Buy Medicines As Prescribed By The Doctor?

There certainly is not a RELIABLE difference. CR and ER are used interchangeably to indicate a medication that is put together to release drug slowly over time. About the same amount is packed in and is released in various brands of the same drug. There is not FDA (nor any other that I know of) standard for how fast a drug is released. It would vary so much between different people that it is basically impossible to make a rule for it. If you get generics you will get different packages each time. If you get the brand it will be reliably made the same way, but it will be the most expensive.