At 200mg a week your husband should already be taking an aromatase inhibitor (AI) such as arimidex/anastrozol, aromasin/exemestane or femara/letrozole.
If he does not wish to do that or cannot get an ai prescription, inject a little less such as 150-175mg on a weekly basis.In my own experience the low end 100mg/week injections were just not getting it done. The extra made a huge difference.
Who administers the T injections? If done at home I would suggest two things.
Firstly change the im (intramuscular injection) and go with subcutaneous injections, they are painless and there will be less scar tissue! 27G-29G half inch insulin syringes are about $8 for 100 at WalMart. (See youtube video of Dr.John Crisler endocrinologist) Most doctors know less about male hormone therapy than they do just about anything else, very sad for your husband.
The next thing I would advise is switch to twice weekly injections with 100mg per injection, rather than once a week at 200mg. Less of a spike in hormone level, (200mg/week is on the high side of hormone replacement therapy, I wouldn't mention this to doctor because your husband may be prescribed much less. Just do subcutaneous twice weekly injections) It offers a slower release of T which means less of a roller coaster peak and drop and less conversion to estrogen / E2.
If per chance the 200mg per week causes testosterone levels rising too high it may convert into estrogen or aromatase. If E2 is high he may lose libido, and can also develop breast tissue. This is called gynecomastia. The nipples begins to feel itchy and may appear puffy before the breast tissue enlarges, not a good thing in men.
If this occurs he would want to lower injection amount (just use less) and start taking a SERM such as nolvadex / tamoxifen.