I went ahead and mentioned alcohol in my reply ... just in case you end up having some drinks. But my reply may still help even if you do not drink at a social gathering.
Benzodiazepines help me, but I know that most doctors prescribe them for short-term usage. They do not go well with alcohol so I do not recommend it for safety reasons.
The above poster that mentioned an opiate and Carispodal (Soma)...I agree with them. However, again, they are definitely contraindicated with alcohol.
If you are a candidate for an SSRI, escitolopram (Lexapro) substantially decreased my Social Anxiety disorder. It is marketed for General Anxiety disorder, but I noticed a distinct improvement as to both anxiety disorders. (I discontinued it because my OCD came back full force, which previously was under control taking Sertraline (Zoloft).
Most doctors will advise to not drink alcohol if you take an SSRI, either...a small number of doctors will strongly caution minimal alcohol intake (1-2 servings) on special occasions/social gatherings. I personally do not think it as dangerous as the above drugs, but I have no medical knowledge, just personal experience or unofficial research.
I have taken Adderall IR (prescribed, 20 mg twice a day) and they made me more talkative, definitely in social settings. They tend to dehydrate, as does alcohol, so being mindful of hydration is very important. It can increase anxiety, however, particularly when it starts to wear off (4-6 hours).
I also have taken Vyvanse, but it lasts several hours and it made me physically tense and very introspective (not social).
The anxiety from the “comedown” on a stimulant ADHD meds is something that you may mentally need to “ride out” (eating, hydration, sleep hygiene factor in). A benzodiazepine or an opiate would substantially alleviate a comedown, especially a benzodiazepine. Taking in Vitamin C will flush the stimulant effects rapidly, so that is an option. I heard Ritalin is a rough comedown, but haven’t taken it.
I do not think it would be wise to take Adderall or another stimulant ADD/ADHD medication for the first time at a party. Trying it at home first would be better, sort of like testing a “setting” for psychedelics. Bupropion (Wellbutrin) is a stimulant antidepressant that has been approved for ADHD/ADD treatment, but alcohol is strictly contraindicated due to seizure risk.
Lastly, it can be hard to “feel” the effects of alcohol while on Adderall (D-Amphetamine salts, is the generic, I think). Some people cannot “feel” the alcohol effects and end up drinking a lot more than anticipated.
That is my opinion keeping in mind harm reduction on drugs that I am familiar with. Alcohol always gives me increased anxiety the next day, it isn’t a good substance for my mental health.
Frankly, I don’t go to social functions unless I want to. I do make sure that I go out and I am not a hermit. Therapy can help you handle your anxiety, something for your mental health toolbox.
If you want to go, it is good to be able to have the option to leave when you want to - if you go with a group and do not have transportation then you can get stuck there for longer than you want. Just knowing you can leave whenever you want, if you are not having a good time, is recommended.
Take care.