I have a PDF of an equivalency chart for amphetamines, but phentermine doesn't seem to be on there. I was kind of curious as to the conversion rate when going from 60 mg of Adderall to phentermine. It seems to me like it takes an awful lot of phentermine to equal just 30mg of Adderall. Just wondering if there is a mathematical conversion like there is for other amphetamines. I am really looking for solid info... aka, real data, but am willing to hear people's experiences that have taken both of there's no scientific data out there. Thanks.
Is there a conversion rate for Adderall and phentermine. Unable to find one?
Question posted by kahealani9 on 27 May 2019
Last updated on 29 June 2021
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3 Answers
Cjsmoooth
27 June 2021
I'm not sure if this will help much, but here is my experience.
P.S. I don't know the conversion rate, however, I don't think that there is one because they are two different classes of drugs.
Though, with that being said, I had been on adderall for about 5 years, up until a year ago. And my dosage was 30mg instant release 2x a day.
And last month my doctor started me on phentermine 8mg 1x daily and that felt mild compared to adderall.
However, this month she upped my dosage to 37.5mg 1x daily and I do notice similarities to when I was taking a 30mg adderall, in how it makes me body and mind feel.
I hope that helps!
-Joanie
Jeno712003
29 June 2021
Glad to hear someone else voiced up here about their experiences with the two meds. Thanks you. Question, do you know how Adderall curbs your appetite, yet that aspect goes away after a short period of time? Phentermine is essentially supposed to be used short-term... it's something like if you don't lose x percent of your body weight in 12 weeks then it's not going to work for you. Did your doc relay that to you? I ask because I've been on it for like 15 years! We started to take me off to see if it was actually doing anything and when I went down to half of my 37.5, I felt cravings/hunger again. My Phentermine was first and the Adderall added years later. In addition, I was on Topamax in conjunction with the Phentermine to essentially make up the appetite suppressant Qsymia. I mention that (although I'm not a doctor) because it was my experience that the two together proved beneficial. So, I'm just thanking, asking, sharing, and now complementing you on your lack of Adderall now (??? ) and hope you find something that suits you well. :)
Jeno712003
29 June 2021
Oh, I forgot... the 'speedy' feeling goes away in time like the Adderall did/does.
Jeno712003
27 June 2021
I have a different answer, direct experience, and a solid doctor. I am on 60 IR Adderall and also 37.5 Phentermine. Phentermine is an amphetamine, so it's an 'upper' as well as the amphetamine (sp) Adderall. No idea of the conversion rate. Just wanted to clear that up.
himeluna
28 May 2019
Hi kahealani9,
There is no conversion rate from Adderall to phentermine since they don't have the same drug category.
Adderall is an amphetamine used to treat attention deficit hyperactivity disorder - ADHD while phentermine is a medication used together with diet and exercise to treat obesity.
Therefore, there is no conversion equivalent in switching from Adderall to phentermine.
Hope this made it clear. =)
Related topics
adderall, weight loss (obesity/overweight), amphetamine, phentermine
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