Thanks for writing to H.C.M.
I have gone through your query regarding sore throat
and change in voice of your husband, you are in doubt weather this is the side effect of Testosterone
and vitamin-D which he had taken a day before.
Madam, this is laryngopharyngitis in your husband and not related to medication he had taken, this is most commonly viral infection and he may take-
(a) Warm saline gargling.
(b) Tab paracetamol
(c) Antihitaminics & Decongestant.
(d) Plenty of fluid orally.
I hope above treatment will help him.