Flexeril and dizziness

Although I have not taken my prescribed 3 pills a day for 10 days (I've missed some here and there), I've noted a bloated, heavy feeling in my body. Turns out tht even with eating right and working out (regular for me), I've gained 5 pounds!! I just hope it's water-weight. I've also noticed the light-headedess and dizziness if I get up too fast from an exercise set when I work out

After falling on my right rib cage, tearing muscle tissue, I was precribed a 5mg dose- 1-3 times daily.

Usually, I only needed to take one during the night, when the pain was worst. (Took ibuprofen during the day -due to the dizziness, drowsiness effects of flexeril).

However, I noted that each morning after I took the flexeril - I woke up like "a bear with a sore head" to quote my wife's phrase. Free -floating hostility, irritabililty - snapping at every minor thing and every one. The effects sometimes taking the whole morning to wear off.

Has anyone else noticed such 'psychological' side effects? I am sure they were attached to the flexeril, since once I'd stopped taking it, the 'bearishness' and chronic distemper creased.

Note: I have been historically a 'drug-sensitive' person, and perhaps even at the 5 mg dose, I was OD'ing. That is one theory anyway.

A friend gave me Flexeril for neck spasms and it caused extreme confusion and dizziness. It's been 18 hours since I took 10mg pill and I still can't focus. This is worse than any drug I have ever taken.