Odd Effect of Breath Meditation I tried breathing meditation a few times recently. I have noticed that every time I use the breath as object, I get a headache and I tend to fall asleep. This fails to happen during compassion meditation or walking meditation. I might even say I feel dizzy, as if I were drunk, after breath meditation. 

What may be the cause of this?
These expected/typical/common results of headache &amp; sleepiness are due to wrong concentration or suppression. If practising Anapanasati, the primary object of awareness should be the relaxed clear quiet mind. The secondary object of awareness or 'sign' should be the mere knowing or noting of each in-breath &amp; each out-breath. While a difficult practice for minds with hindrance, to truly practise Anapanasati, all possible craving must be abandoned. In other words, there is no need to direct the mind towards the breathing. All that is required is mental stillness &amp; quiet. Sit upright, relax &amp; surrender with faith to the Dhamma.