Achieving Orgasm on Medication (Male)

I am currently taking 75mg of Lexapro and 150mg of Wellbutrin. The last two times I've had sex while on the medication I have orgasmed fairly early on but managed to maintain my erection for as long as necessary afterwards, but not coming close to climaxing. I'm wondering if this is something worth mentioning to my doctor or if there's and explanation I should be aware of or anything of that sort.

Read the common side effects of both meds. Not everyone will experience these listed side effects and you may experience side effects that are not on the list. Everyone is different.
If you have just recently gone on these meds or the dosage has recently been raised, then side effects that you have now may not have been present before.
Side effects that are strong now, may get better after awhile of being on the meds. The body can adjust.
Mentioning this to your doctor may offer you some solutions. They want to know how it is working out for you (or not). Keep your doctor aware of how you are doing.
I had dry-mouth form a certain med. It was giving me bad breath and dental issues. I now carry a water bottle with me and keep myself hydrated. I pee a lot, but I can deal with that.
Give it time.
Best of luck to you.