Is 135mg of MST (morphine) lethal?

[Wishmaster]

I generally don't have much access to drugs, but I've recently got my hands on some MST. I have zero tolerance to this stuff. I weigh around 112 pounds.

Just wondering whether it's worth taking now or if I should wait until I get other drugs that might assist it. Tried googling it but the results vary quite a bit.

Does anyone know what the lethal dose may be? And would I need antiemetics?

 

[win32]

Probably not. Information on the LD50 of morphine is scarce and sources are highly conflicting.
Yes, you'd need antiemetics, morphine in particular is highly prone to causing nausea.
Morphine isn't the best opioid for this and you would probably survive. Combined with lots of alcohol it's a "maybe" if you manage to avoid vomiting it all up.