Which part sounds strange? The amounts of each drug listed hasn't been released in anything I've read. Maybe someone on here knows the amts. of the 3 drugs were ingested. Method of injestion seems important as well. But when you throw a bunch of alcohol into the Rite Aid mix all bets are off.
Methadone is handed out daily to junkies trying to kick the habit or avoid being sick from withdrawals. Soma and Valium in and of themselves are taken by housewives, sometimes daily. But I guess if you are talking about a pill of methadone (snorted), 5 valiums, and a couple of Somas, it would make a boy that size sick at his stomach at best-- dead at worst. Alchol multiplies the risk. Seems your vital organs just stop working under similar conditions. BTW, the drug carisoprodol's common or street name is Soma.
I'm not just making this stuff up. The woman called a girlfriend that works for a doctor. Also found that "snorting" a pill raises the toxicity because it hits all at once, rather than time released like it is suppose to work. All this was explained to her in layman's terms that they decided was "dumbed down" enough for me to understand. Sometimes women piss me off.