Just take my word for it.... drugs do not need acid to be absorbed. In fact the acid in the stomach can interfere with some drugs (peptide types, etc). Some drugs are enteric coated for this reason. Some nutrients do need acid environment for absorption, and acid is needed to digest protein.

Crepitus is the sound that joints make when they are grinding against each other. The clicking you hear when you swallow is from your eustachian tubes trying to equalize the pressure for the middle ear.

If you have problems swallowing, often, or feel weak all over, you should be evaluated for Myasthenia gravis. I'd suggest you read our forum here. There are several men who participate who can help you find appropriate medical interventions, tests.
Myasthenia gravis is an autoimmune disorder where the antibodies attack the neuromuscular junction, and produce weakness.