> ## Content Index > Fetch the complete content index at: https://therobexperiment.com/llms.txt > Use this file to discover other available public pages before exploring further. # My Extreme Experience Having A Mixed Pfizer-Moderna COVID-19 Vaccine Jab (3rd-Dose) - URL: https://therobexperiment.com/blog/my-extreme-experience-having-a-mixed-pfizer-moderna-covid-19-vaccine-jab-3rd-dose/ - Published: 2022-01-13T16:00:00.000Z - Updated: 2024-03-08T11:11:45.000Z - Description: There have been a number of curious individuals interested in considering a "Pfizer-Moderna (PPM)" mixed vaccination dosage, but most are unsure if the side effects are something they can manage. Here's my personal story of a slightly extreme outcome while chancing on a Pfizer-Moderna mixed jab. - Author: TheRobExperiment - Tags: Health, COVID-19, Pfizer, Moderna, Vaccination, #Import 2026-08-19 13:32 I'm writing this to share my experience with those who have the intention of getting a mixed-vaccination jab (*3rd-Dose / Booster Jab*) with a [**Pfizer-BioNTech/Comirnaty**](https://en.wikipedia.org/wiki/Pfizer%E2%80%93BioNTech%5FCOVID-19%5Fvaccine?ref=therobexperiment.com) **\+** [**Moderna**](https://en.wikipedia.org/wiki/Moderna%5FCOVID-19%5Fvaccine?ref=therobexperiment.com) combination. ![](https://raw.githubusercontent.com/sgrobert/ghost-therobexperiment-assets/main/2022/01/Covid-Vaccinations-Homage-2021.jpeg) Credits: [Homage Singapore](https://www.homage.sg/resources/covid-vaccines-booster-shots/?ref=therobexperiment.com) This was reported in the news quite recently in late-2021 ([here](https://www.google.com.sg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjZ9KrVt7D1AhW47XMBHbNIDxUQFnoECBkQAQ&url=https%3A%2F%2Fwww.reuters.com%2Fbusiness%2Fhealthcare-pharmaceuticals%2Fmixing-pfizer-astraz-covid-19-shots-with-moderna-gives-better-immune-response-uk-2021-12-06%2F&usg=AOvVaw3TDPJeWUrLay92m9Z-6SYT), [here](https://www.google.com.sg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwimz7%5Fnt7D1AhWoILcAHTJfBAw4ChAWegQIAxAB&url=https%3A%2F%2Fwww.channelnewsasia.com%2Fsingapore%2Fcovid-19-vaccine-pfizer-biontech-moderna-booster-which-better-2314886&usg=AOvVaw2GOshjjAMlN1eOfcWfZi-o) and [here](https://www.google.com.sg/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwjZ9KrVt7D1AhW47XMBHbNIDxUQFnoECAIQAQ&url=https%3A%2F%2Fwww.homage.sg%2Fresources%2Fcovid-vaccines-booster-shots%2F&usg=AOvVaw3NY4u1VbpFe7AmKmdKankf)) to have higher efficacies as compared to a [*Pfizer*](https://en.wikipedia.org/wiki/Pfizer%E2%80%93BioNTech%5FCOVID-19%5Fvaccine?ref=therobexperiment.com)*\-Only* / [*Moderna*](https://en.wikipedia.org/wiki/Moderna%5FCOVID-19%5Fvaccine?ref=therobexperiment.com)*\-Only* dosage. --- ![Defend against coronavirus.](https://images.unsplash.com/photo-1592392513912-fd639ff32e98?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=MnwxMTc3M3wwfDF8c2VhcmNofDI2fHxDb3ZpZHxlbnwwfHx8fDE2NDIzNzcyNDg&ixlib=rb-1.2.1&q=80&w=2000) Photo by [Roman Grachev](https://unsplash.com/@whynot00?utm%5Fsource=ghost&utm%5Fmedium=referral&utm%5Fcampaign=api-credit) / [Unsplash-](https://unsplash.com/?utm%5Fsource=ghost&utm%5Fmedium=referral&utm%5Fcampaign=api-credit) ## The Experience I would like to **strongly stress** that this is **#notmedicaladvice** as I'm **#notamedicalprofessional** and I'm **#justsharingmypersonalexperience**. > Remember that **everyone's body reacts differently to the vaccines** and my own experience may be totally different from your own experience. Please use my story more as a "*preparatory reference*" rather than a yardstick for your judgment on your booster vaccination decision. Here are some summarised snippets of what happened: ### A. Pre-Jab Booking - Originally booked for a Pfizer shot, my booked Pfizer-centre **had apparently converted to a *Moderna*\-centre**. - The staff assured that it was *common* to have a mixed Pfizer-Moderna (PPM) shot & most of the current medical teams at the vaccination centers had taken that combination. - My Moderna (*Booster*) jab happened on the *10 January 2022 (Monday) at about 10:00am*. ### B. Day 1—Post-Jab Afternoon - **First 1-2 Hours**—Felt "*Heavy in the head*". - ***6-8 Hours In***—Experienced some mixed soreness in my joint areas, like my neck, wrists, and elbows when they're flexed or bent, as well as my back. - ***10-12 Hours In***—Ate lesser than my normal serving for my dinner, due to not having much of an appetite for the evening. Overall, my entire body "*heated up*" every now and then. So, I drank up lots of water and stayed in an aircon room to help level off the body heat. ### C. Day 1—Night - It was an ***Absolutely Horrible Nightmare*** for me! - The body reactions went on *continuously from 9:30pm to roughly 4:30am*. - Attempted to sleep but my body was twitching uncomfortably between a mix of ***Extreme Hot Fevers + Cold Childs***—My body was shivering uncontrollably despite being under a thick blanket and having the aircon switched off - Experienced an *unknown acute pain in the neck area*, which turned worst when I slept on my side. - Besides the usual injection-site hurting and being unable to raise my arm above my head like most people, there were **numerous other points on the body that had random soreness, prickly pains, and bone-squeezing experiences**. These revolve around key places such as *the neck, joints, and bones in my back*. Overall, I was **feeling really weak**, with random "*needle pricks*" on the palms and soles of the feet. **Due to the high temperatures all over my body, plus the lack of sleep through the night, I seemed to have also *hallucinated***, making the night even harder to rest well. There were also **some mixed bouts of breathing difficulties** throughout this late-night experience. ### D. Day 2—Morning - Thankfully my mind had cleared up and I had really thought that the worst was already over as I felt *refreshed*, despite having roughly a total of about 2-3 hours of sleep. Despite my **One *Unforgettable* Night of Suffering**, I did realize that the following helped: 1. **Having a huge cup/bottle of water ready is helpful** to tide through the night—I hastily grabbed water from the tap to quench the water loss due to the constant fever + cold sweats. 2. Ready some [Panadol pills](https://en.wikipedia.org/wiki/Paracetamol?ref=therobexperiment.com) and consume them when necessary will help—I took some immediately after breakfast, and it really helped soothe the headaches + body pains till the 6-hour period was over. ### E. Day 2—Afternoon - Right after sitting through a video call, I was *unexpectedly struck* with a **Second Round of mixed *Hot Fever + Cold Chills*** in the middle of the hot afternoon. - *Had some challenge trying to squeeze some lunch food in* as I was still shivering. I quickly took a second round of Panadol pills after the 6-hour difference. - Struggled through the afternoon while attempting to catch up on some recovery-sleep but was constantly **kept awake by the hot, the cold and the pains all over my body**. - **Things seemed to be improving** as time rolled past 4:00pm - 5:00pm, as I believe the ending of this Second Round would represent *the last of my ordeals*. ### F. Day 2—Night - I rarely get sick. So either my body has decent viral defences or I'm really just really down on my luck as I was **struck with a Third Round of similar symptoms**. - *Woke up shivering-cold at 9pm* after trying to rest earlier. **Taking dinner and having food in the body did help ease the shivering, but the *overall pains and aches all over the body still persists***. - Upgraded the standard Panadol pills to [Panadol Extra](https://amzn.to/3GAxzlf?ref=therobexperiment.com) right after dinner. There was a slight improvement in terms of headaches and bodily pain relief. By now, I'm just *praying and hoping that tonight will be a better night*, as going through another similar night of ordeal will really be unimaginable! ### G. Day 3 Thankfully, my body seemed to have "*cleared the storms*", by Day 3 morning. Just to be safe, I took a one-pill round of [Panadol Extra](https://amzn.to/3GAxzlf?ref=therobexperiment.com) right after breakfast. The rest of the day went on smoothly. --- ![Coronavirus has no race](https://images.unsplash.com/photo-1583946099379-f9c9cb8bc030?crop=entropy&cs=tinysrgb&fit=max&fm=jpg&ixid=MnwxMTc3M3wwfDF8c2VhcmNofDE2OXx8SGVhbHRoJTIwbGVzc29uc3xlbnwwfHx8fDE2NDIzNzcxNTM&ixlib=rb-1.2.1&q=80&w=2000) Photo by [visuals](https://unsplash.com/@visuals?utm%5Fsource=ghost&utm%5Fmedium=referral&utm%5Fcampaign=api-credit) / [Unsplash-](https://unsplash.com/?utm%5Fsource=ghost&utm%5Fmedium=referral&utm%5Fcampaign=api-credit) ## Lessons Learnt For The Next Booster Round ### Shared Experiences From Friends - **Moderna seemed to offer a slightly-stronger dosage** as compared to Pfizer as most individuals who took either *(a) Moderna-only*, or *(b) Pfizer-Moderna-mix* dosages do report a higher occurrence of falling ill after their jab(s). - **My case seemed to have been one of the "*more-extreme*" cases, but *definitely not a unique, outlier case***, when it comes to embarking on a *Pfizer-Moderna (PPM) jab*. There are 1-2 instances who do experience more prolonged discomfort that extended a few more days than mine. - **Do consult your personal doctor on your medical history before attempting to mix** as well, as different individuals will have different experiences and side effects. ### Future Preparations 1. **Prepare some Panadol /** [**Panadol Extra**](https://amzn.to/3GAxzlf?ref=therobexperiment.com) for pain relief from headaches and bodily pains. 2. **Ready & Drink lots of water** to quench thirst & replenish water loss from cold sweats & fever. 3. **Having some coconut water** around does help with recovery faster. --- I hope the above will serve as a useful reference sampling in making your own decision on whether to embark on a mixed vaccination dosage. Thank you for reading & do stay safe! ;)