Welcome to HealthcareMagic forum.
You are on nexito and lonazep probably with the aim of treating depression
In this context the excessive sleepiness, weakness and feeling lowly can be attributed to both the drugs. However I would also like to see you completely treated from depression (if that is what you have) as they can also affect your daily activities and energy levels.
In addition, over correction of sugars may produce similar symptoms and those needs to be ruled out too.
In brief, in the order of descending (from most common to less likely) your current symptoms could be due to
1. Drug induced
2. Depressive episode
3. Low sugar levels.
Discuss with your current treating doctor to make the necessary changes in your treatment.
As far as side effects of nexito and lonazep, both share almost the same effects which includes dizziness
, sleepiness, constipation
, dry mouth
, sexual affects, etc.
Hope this answers your query.