| Fer God's sake see a doctor.
If you need stronger stuff than the normal dosage of over the counter painkillers, get some professional help. Don't mess about with home brewed pain killer remedies, they can have dire consequences. To much paracetemol will cause irreparable liver damage, if you overdose on that stuff it's irreversible and can be fatal.
A cocktail of painkillers? A mix and match 'do-it-yourself' remedy taken from advice on a motorcycle forum? It may have worked for other people who did it using direct advice from their doctor, but taking them on secondhand advice from people who know about motorbikes but sweet FA about medicine? Get real Dom, it's your body we're talking about here and you've only got one, so look after it fer crying out loud.
There is not one person on here that can give you direct advice about what doses are safe to take or what mixture of painkillers you can take and the obvious stuff about drowsiness and riding whilst in cloud cuckoo land have already been said.
There's some pretty macho stuff going on here but it's a DD round for goodness sake, not BSB.  | 
Jools
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