Lorazepam varies from person to person, I've been on it a few times now and I remember feeling those symptoms.
But Lorazepam is "a high-potency short-to-intermediate-acting 3-hydroxy benzodiazepine drug that has all five intrinsic benzodiazepine effects: anxiolytic, amnesic, sedative/hypnotic, anticonvulsant and muscle relaxant." - (Wikipedia.)
So, it can make you feel any of those symptoms.
It can be quite powerful, so it's to be expected considering the nature of this drug.
This is what is said about side effects that can occur;
"
- drowsiness, dizziness, tiredness;
- blurred vision;
- sleep problems;
- muscle weakness, lack of balance or coordination;
- amnesia or forgetfulness, trouble concentrating;
- nausea, vomiting, constipation;
- appetite changes; or
- skin rash."
Hope the above has helped somewhat?
I would call NHS direct if you feel worse or any worrying symptoms occur and ask for their advice(or you can call them now for advice on what to do, they may be more specialized, your choice).
Take care.