Has anyone reported a crazy increase in sex drive with phentermine use?
Question posted by Terina on 26 May 2010
Last updated on 2 January 2025 by SeanRo75
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35 Answers
Here I am driving home from work after being on phentermine for two weeks wondering what’s wrong with me. I’m a middle-aged heterosexual male that is fine having sex once a week. Since I started this stuff think about sex all day… I mean any kind of sex, with anybody, any gender, anytime all day. It drove me to start a Google search “Why does phentermine make me so horny?” which led to this thread. You have no idea how much I appreciate all of you taking the time to share your experiences. My physical response to the hyper-fantasizing is similar to yours. I don’t even need to be touched to get close to an orgasm. It’s CrAzY. But at least I’m not the only one.
Hi, this seems to have happened to my sister - drastically increased libido as a result of taking phentermine for weight loss. She stopped taking it several months ago but is still experiencing increased libido - has anyone experienced this side effect continuing after stopping the drug?
Yes it indeed does! I’m on this right now, this is my second week, and the last 2 days my sex drive has been crazy. I am constantly horny af. I woke my husband up at 4:30 this morning.. and it’s 9 am and I want it again. It’s all I can think about! I’ve been talking dirty to him over text and ready to jump his bones when he gets home! We may need medical attention soon! Mercy sakes ! And I’m down 7 pounds! Whew ! Best drug ever!
Yes yes and yes it makes you horny and quick. I already have a very very high drive but just today I work from home and on my lunch break I took the 37.5 MG tab right before I ate and less then 20 minutes later I chased my wife into the bed room. She said afterwards she gotta talk to the Dr because she can not continue to be my daily exercise routine. I'm gonna love the next 3 months and I think she will too.
I have, it took about 3 weeks before it started... I used to care less about having sex; My husband and I would make sure to have sex at least 2 times a week but he would always have to initiate because if we didn't have sex I didn't really care (The sex was always great I just needed to be put in the mood to care). Now I spend my entire day thinking about jumping his bones, sending him messages, and chasing him around the house in lingerie after putting our daughter to bed. On top of that if I get a free moment (kid naps, school, hanging out with friends) I spend my day in and out of my bedroom. My sex drive has consumed me, my focus and forgetfulness are doubled due to it. My husband thinks I'm trying to kill him in the best way possible.
I've been taking 37.5mg for 2 months. Lost about 40 pounds and more energy etc. The sex drive is insane. I've always had an average libido but after taking this, it has skyrocketed. I've learned to channel it but being single on phentermine sucks. Rewards of the weightloss and etc. definitely outweigh the the negative( if you can call it that).
40 y/o F here! I started taking 30mg once a day about 6 weeks ago. About a week after I started taking it around lunch time is when I began feeling highly aroused for no apparent reason. That first day is so vivid in my mind because I was sitting at my desk at work and was thinking about what I was going to do for lunch and the only thing I could think of was sex. Food was the last thing on my mind which was a good thing because obviously I’m trying to lose weight. At first I didn’t think much of it until I decided to go home for lunch and fulfilled that urge inside me. I’ve never done that btw! Ever!! Not on lunch. On my way back to work is when it hit me and I kinda giggled inside and just thought I was hitting my sexual peek. I was somewhat excited because intimacy with myself, other men or women was the last thing on my mind over the last ten years.
After I got back to work, I couldn’t focus on anything and noticed my mind wandering off in fantasy land. I started having naughty thoughts about every good looking guy and girl in my office that walked by my desk. Let’s just say I didn’t get much done that day which was honestly really frustrating. After work I went home and took a shower and the feeling of the water hitting my skin turned me on. Crazy right? That turned out to be a long shower if you catch what I’m saying. Then I got out of the shower and still felt unsatisfied. I got off again. I finally got out it bed to cook some dinner and noticed I was really wet. That’s somewhat normal of course because of what I just did but what wasn’t normal was the amount of discharge that was leaking out of me. I had just put on my underwear only twenty minutes ago and I felt like I peed my pants. Again, I just kind of giggled and changed my undies and finished dinner. After dinner, the urge was still there and let’s just say I laid back down on my bed and didn’t leave my room the rest of the night. The next morning I woke up and that’s all I could think of. Went to the gym before work and it was difficult to focus on my workout because that was the only thing I could think of.
That’s when I started to wonder wth was going on with me. I honestly thought it was great but also thought something was wrong with me until I put two and two together. The only thing that changed was this medication. This morning I woke up and decided to Google it and I couldn’t believe that it popped right up as one of the first things from taking this medication. I love that a I have an increased libido and now I’m getting anxiety thinking of when my doctor plans on taking me off of it because let’s be honest, I’m 40 years old and haven’t felt this way in a long time. It’s kind of refreshing to be honest with it and makes me feel younger. I was single and technically still am when I first started to feel this way, so the only bad thing in the beginning was that I didn’t have anyone to share this with other than myself. Although it’s difficult to focus on work and even daily tasks, I’ve found that my mood has drastically improved throughout the day and with my weight loss I’ve noticed more and more men also seem to approach me more often. Recently, I started dating a man two weeks ago and at first he seemed to love my sex drive but I think I’m wearing him out because he can’t keep up with me and the last few days he’s made excuses why he can’t come over. I think I’m scaring him away.
I wanted to add more to this…..
I felt like I was scaring the guy a I started to date away because he started making excuses when I’d invite him over. I almost feel like he’s intimidated that he can’t keep up with me. The last two times he spent the night I kept him up almost all night by waking him up off and on throughout the night and he finally told me that he can’t go any longer. He told me, I have to sleep I’m sorry! The next day he jokingly texted me that I need to clone 4 of him in order for him to keep up. I jokingly replied, Is this your way of asking me to have a 4 some? He laughed and said no not at all but Evan if that was the case you might give 4 guys a run for their money.
The reason I’m mentioning this is because I recently did some research into having an insatiable sex drive and started to read about what the medical works refers to as “risky sex”. After he said that to me, I honestly started to think about having sex with more than one man. The thought of it highly aroused me but then after thinking about it, I stopped myself and was like enough is enough! That’s not me at all. I could never do that, nor have I thought about that and started to really try to focus on the fact that this is simply just a side effect of this drug. However, this last weekend I went out with my gfs to happy hour and went home with guy from work which was amazing but I kind of felt bad because again that’s not like me at all to hook up with more than one man. Neither man has any expectations of being in a long term relationship, nor do I so it’s not like I’m cheating but it still isn’t like me.
My gf who’s been married for twenty years told me to just enjoy it and have fun. She said one day you may be married and after a few years you’ll be lucky to get some more than a couple times a month. Just enjoy it while it lasts, you’re single! Either way, that was Saturday and Sunday guy #1 came over earlier in the day and after he left, guy #2 had texted me and asked me if a I wanted to hang out for a little bit. At first I told him, I couldn’t and then a half hour later I was outside enjoying the warm weather and it hit me like a ton of bricks. I texted him back and told him my plans fell through and asked him to come over. We had sex 3 times within a 4 hour period and told me he fast to get home to get some things done around his house and I practically begged him to stay because I still felt like I needed more.
I just started today. I can absolutely say yes it does. I couldn’t figure out what was going on with me I wanted to jump on my husband literally multiple times throughout the day. I mean I have a normal sex drive. But today literally everything he did, every touch, I was READY. No complaints from me. Sure there won’t be any from him either haha!
Yes!!! I feel like a dang rabbit! I am taking the 37.5 in the morning? Day 5. Hope I typed the right dosage, if not its the one closest to that number lol. I go back in a week to let Dr know how I tolerated this medicine. I'm tolerating it wonderfully no bad side effects just dry mouth.
Hubby loves my newfound sex drive. Its bringing us closer together cause he's the type of man that could have sex 5-6 times a day if he could lol. So no you're not crazy!
(Male) Been on the 40mg for almost a month, the first 2 weeks I lost all interest in dating/sex, and spent the entire time awake and just zoned out.
Then out of nowhere, it's like I'm 22 again (32 now) and full of energy and an insane libido. Another 2 months of this
Sweetie I don't know what you're on but Phentermine does not come in 40 mg
For Carly Sue, in Australia it's prescribed under the brand name Duomine and it comes in 15mg, 30mg and 40mg.
Omg, I thought it was me...
I was prescribed Phentermine and my sex drive increased, but so did my concentration.
I am actually relieved at the libido increased, because my sex drive had decreased and It really started to effecting my self esteem. However, I was pregived the Phentermine to loose weight and I don't intent to use it long term. Does anyone have any recommendations for Women libido increase.
Thank you
The Wiz
I really knew something was up. It's like a 247 occurrence for me. I mean way worse then before. This is my 3rd and last month. And it's been every day since. It's driving me crazy lol especially cause I'm single haha
I finally googled to see what was up with me. I am walking, sitting , laying down and feel like I am about to have an orgasm. It's really tough being single right now. Doesn't matter if I relieve myself because the intensity comes right back.
For what it's worth... I'm taking 37.5 maybe 4 days a week just to try to lose stubborn 30lbs or so that's accumulated after years and how do I put this... it makes my balls hurt EVERYDAY I take them. I wouldn't say it increases my sex drive because I'm a pretty healthy "normal" single guy and of course I already think about sex multiple times a day and basically everytime I see an attractive woman. It is exactly like blue balls! It must be somehow affecting sperm buildup throughout the day. Everyday my balls hurt really bad, just like if I was being "stimulated" for hours without release. And sometimes there is definitely a little leakage. Maybe it's also messing with my prostate. I dunno. No issues with anything before or when I don't take it. Very strange. Actually, I guess it does increase my sex drive just a little. And of course, it goes away with release!
40s. 6'1" 210. Eat good and get lots of excerise and water. No health issues at all, except for swollen painful balls everyday. Oh and the Phentermine is not working as far as making me not want to eat. It's just like super dooper caffeine.
I'm just starting my second month on Phentermine 37.5 and it hit me overnight as well. I just can't seem to get enough and constantly wet. Not sure if it's the running or the med. :D
Related topics
Further information
- Phentermine uses and safety info
- Phentermine prescribing info & package insert (for Health Professionals)
- Side effects of Phentermine (detailed)
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