A lot of people also abuse Benadryl to sedate themselves. In the long run, the habit of overdosing on Benadryl can affect ones health, social and personal life adversely.
The side effects include confusion, dizziness, extreme drowsiness, headaches, difficulty in urinating and even derelium and hallucinations in extreme cases.
In case a person is allergic to Benadryl it can cause difficulty in breathing and or swelling of lips, tongue and hives etc.
Benadryl is usually prescribed for allergies and cough etc. However, if one starts abusing it, it can turn as addictive as alcohol or gambling etc.
If you or anyone you know has gotten into the habit of taking Benadryl doses, you must consult your healthcare provider and seek counseling as soon as possible.